A mysterious door

"Quick!" shouted Bonnie. "In here!"

"What's through there?"

"I don't know, but it can't be any worse!"

Susie hesitated in front of the large oaken door, which seemed almost to have materialised out of nowhere, blocking their path. But Bonnie was already pulling it open, and the sound of a pair of laughing cheerleaders coming up behind them decided her. Girls as naked as she was couldn't afford to be choosers.

She followed Bonnie inside. The door slammed shut behind them.