If you include aa male wrestling referree in the video, then after using cloudgazer2k's idea, maybe try this:
After the girl who quit has been tied and tickled, the male referee tells her tickler, "Don't leave so soon. There's a new rule you don't know about."
The referee reads from a binder marked New Wrestling Rules , "While the wrestler who did not quit gets credit for victory, in the name of fairness the loser gets a turn restraining and tickling her."
Then, once the loser's tickled the winner as the male ref leered, enjoying it immensely, the girls discover he was "reading" from an empty page. Realizing he made that up, they restrain and tickle the referee.