Sandra didn’t answer, but she had one hand down the front of her jeans working furiously. “Sandra!” you cried again as you felt the ceiling crack against your expanding back. “I’m getting too big! I’m going to destroy the building!” You could feel your back and head pressing through the ceiling, and plaster was starting to avalanche down the sides of your torso and down your back. Desperate to minimize the damage, you dropped to all fours, and bought you (and the building) a moment’s respite.
Your head now hung right above Sandra. She was still vigorously masturbating, but she wasn’t looking at your face. Her eyes were locked on your dick, now longer than her arm and significantly fatter. Despite everything—Sandra’s betrayal, the damage you were causing—you were still living a fantasy. You were growing into a giant! Your penis twitched and swelled, stiffening slightly. Sandra reached out to touch it.
Now was not the time. “Sandra!” you bellowed, pushing her shoulder with a couple of fingers. “I don’t want to kill anyone! Get out! Get everyone out!”
Sandra dragged her eyes away from your penis back to your face. “M-Moe,” she muttered, struggling to reclaim clarity. “W-wha…?
“GET OUT!” you roared, shaking the building. You felt your back once again pressing into the ceiling, even with you on all fours. “NOW!”
That got through. Sandra snapped to attention, then shook her head as if to clear it. She got hand out of her sopping wet pants and got to her feet.
Just then, you felt your muscle bulge and stretch. A sudden surge of mass sent your body through the ceiling of Sandra’s lab. “Sandra, go-!” you got out, before the ceiling collapsed into the room below. “Sandra?!” you cried, as, even on all fours, your head and back started emerging into the second floor.
The fire alarm started wailing and you breathed a sigh of relief. Sandra must have finally gotten it together enough to pull the alarm. That would empty out the building.
You took a deep breath and slowly, carefully, got your feet. You felt more walls and more of the ceiling break apart as your shifted position and slowly straightened your legs. Your broad chest tore more of the ceiling apart as you straightened up.
Finally, you stood at your full, and steadily increasing, height. The top of your head was brushing the second-floor ceiling, and within seconds started to push through the flimsy drop paneling.
Your head emerged into a hallway on the third floor. You blinked dust out of your eyes and saw two young women staring at you wide-eyed from a few yards away.
“What are you doing?!” you yelled over the sound of the fire alarm and straining beams and tiles. “Get out of here!”
Neither of them moved as your shoulders rose through the crumbing floor, enlarging the hole your head had made. Instead, as your muscular chest expanded into the hallway, one of the women slipped a hand under her waistband. The other moved a hand under her shirt and started massaging her breasts. “Great…” you muttered. Whatever super-pheromones you were giving off that had made Sandra kick your growth into high gear were evidently still working. You could only roll your eyes as your head started breaking through the third-floor ceiling into the fourth floor hallway.
Then you became aware of a new sensation. You bit your lip as your semi-erect penis rubbed against the ceiling between the second and third floors. You stiffened to full attention at the sensation, and your erection, which had to be several feet long by this point, broke through into the third floor hall.
“Oh, wow,” you breathed. As your head started through another ceiling, the last one in this four-story building, you could feel several tiny hands eagerly rubbing your cock as it grew.
Finally, your head emerged from the roof of the lab building and you blinked in the bright afternoon sun. The girls were still working your cock, but now you also could feel your body—your thighs, calves, butt, feet, and chest—pushing apart more and more of the building’s structural supports. The lab gave a groan as your shoulders rose above the roof.
“Uh, oh,” you muttered.
As if on cue, the entire building collapsed around you. You cringed at the roar of collapsing metal and masonry, and a cloud of dust rose into your face. After a moment or two of coughing and hacking, you waved the dust away and got a clear view of your surrounding and of the damage.
“Oh, shit.”
A crowd had formed in the streets and walks surrounding the lab building. Emergency vehicles, lights flashing, were between the collapsed building and the bulk of the crowds. The exception was one group that was running away from the remains of the lab. They must have been the last of the fire alarm evacuees.
The building for its part was completely destroyed. A heap of rubble, fortunately not extending much past the lab’s original footprint, was heaped around you in a pile that reached almost to your mid-calf. You could feel the rubble shifting around your feet and tickling your soles as you continued to grow steadily.
You looked down and saw the two girls from the hallway still clinging to your penis. By now, with you probably knocking on the door of 60 feet, your erection was bigger than either of the two girls. They looked a little battered from their ride, but alive. One had taken off her shirt and bra at some point and was slumped back into the forest of hair at the base of your shaft. The other had removed her pants and was slowing bouncing and grinding a little in front of her friend as she straddled you. You glanced at the crowd, then back at the two girls. You blushed and gently removed them from your cock.
The crowd gasped as you bent down and gently placed the dazed young women on the street. You looked around while you had a closer view. “Sandra?” you called softly. You didn’t see her, and no one came forward. “Sandra?” you said again, louder this time. The people in the crowd started looking around, confusion on their faces. “Did anyone see Sandra make it out?” You were starting to breathe quickly. “Sandra!” you called. Several people covered their ears. “Please answer me!”
You heard the rubble shift somewhere under you. You stood back up, gazing down toward your feet and trying to pinpoint the source of the sound. You heard it again, and this time you saw some of the debris shift in front of you. You were about to start digging at the spot when a slab of drywall, insulation, and broken studs slid away as a muscular bare back pushed it aside.
“Wha-?”
The person under the debris must have been on their knees. They kept heaving up, trying to push off the rubble. More wreckage slid aside exposing more of the fair-skinned back, a large bare ass, and finally, a thick tangle of brown hair covering broad, muscular shoulders and the back of a head.
“Oh, my God,” you said, and knelt down to help Sandra to her feet.