His former eyes widened in terror, one of his more muscular arms pointed up towards him. "M-m-m-." Your old voice stuttered.
"L-Liz? Is that you?" Steven asked. Steven's old body gawked in horror, looked down at itself, and then returned it's gaze to him.
"Steven?! What the hell is happening?" Shrieked Liz from his old body, everything was starting to fall together. "Am I in your body?!"
Steven picked himself off the ground, using a shelf for support. His head swam as he stood, but he didn't feel like fainting again. "It appears we switched." Steven looked around the store, seeing more people slowly getting off the ground. There were a few already standing and helping others, they seemed to be calm while the majority of the employees and customers were freaking out. Either they were screaming, feeling their body up or generally panicking, it appeared as if whatever had happened to Steven and Liz, was happening to others as well.
"How is this even possible?" Asked Liz, pulling herself off the ground and standing next to Steven. Just as Steven was transfixed by his new anatomy, Liz appeared interested as well, her hands were down 'his' pants, apparently fondling Steven's old genitalia.
"Er, Liz, having fun?" He asked her. Despite what was happening, he felt strangely calm. Maybe it was shock.
Steven's old cheeks filled as Liz blushed. "Sorry Steven, it's not every day a woman has extra bits down there..." She said, her voice shaking.
"Imagine how I feel." Steven said to Liz in her own voice. "You should be glad I'm still wearing your clothes." He said, grasping his new breasts and looking down at the crack of cleavage spilling from his new shirt.. Liz made a face and pushed his shoulder, sending him into the shelves. "Ouch." Steven said, as his new petite frame hit the metal.
"Oh shit, I'm sorry Steven!" Said Liz, Steven's old face apologetic. "I guess I don't know your strength."
"It's ok, but what are we going to do Liz?" He asked her. "If this is actually happening, how are things ever going to be normal again?" Before Liz could answer...