Naruto could take any kind of pain, physically and emotionally. Yet the sad fact that Sakura's stinky feet would defeat him in more ways than one is enough to break him from inside. All under the irony, of course, that the term "Sakura" is commonly associated as a sweet smelling flower. Right now, nothing smells similar to cherry blossoms.
But Naruto, for his own pride, suddenly grabbed both the ankles of the stronger shinobi, wanting to get away from the humiliation.
"Must... not... lose!..." Naruto thought.
"Tsk tsk, why do you struggle, when my feet has already weakened you? Just lay down, and smell my FEET!" Sakura said as she intensified the pressure on his sorry face and nose.
"Ugh!" Naruto groaned as her stale stink penetrates Naruto's will like a kunai hitting any part of his body, yet it stings more than anything.