Well. Joker can't say she wasn't expecting that, or something worse. She hits the ground with a grunt, already feeling herself getting drained. This is really the worst situation she could get in-

"So rough, Ginko! Ya gotta be gentle with a girl's first time!"

-and yet, she's really, truly incapable of not saying shit.

That doesn't mean she's not desperate, and she tries to snake her arm up to grab a fistful of Ginko's hair. Anything to distract her, loosen her grip.