By the time Kyoko returns with the ice, Shinji's finished cleaning up and bandaging the scrape, so all the remaining first aid supplies have been placed neatly off to the side. Easy peasy.

So with the ice at hand, that's all he'll really need--

wh

hey!!!

"W-wait!" Before she can dart off, he reaches for her wrist to keep her from leaving. "This is plenty, really!"