Ranma ½, part 6 number 8

Akane and Ryoga are on a date at an amusement park. Meanwhile Shampoo and Ranma are trying to get back the waterproof soap from Ryoga. Ryoga and Ranma staqrt to fight while Akane gets knocked out by Shampoo, then hypnotizes her and gets the soap from Ryoga, although Ranma proceeds to swallow the soap.

Ryoga picks up Akane and runs off with her. Ryoga gets too excited, though, and begins damaging things and that really scares Akane. Ranma rescues her.