Ranma turns around and leaps at Kunou, with a quick warning to Shampoo. Watch out, Shampoo. You'll get hurt. Instead of Ranma punching him, he hugs him and rubs his face against Kunou's chest again. Embarrassed, Ranma puts a fist in Kunou's face as the students look on in surprise.
Shampoo thinks for a moment, and then realizes what's happened.
Kunou's sneeze was so much louder than her finger-snap that Ranma's responding to sneezing instead of snapping. Ranma, of course, starts hugging all of them. Shampoo's a little irked, and knees Ranma in the head. She rides away on her bike, in a huff, leaving Ranma to his fate. Ranma hugs him again.