Foster, the school's grumpy old old gardener, was heard in the distance.
"I hear you damn kids screwing around up there," came the voice from the bottom of the hill, "You better disappear before I catch you there."
And, unable to do anything else, Karyn did. Her body shimmered right out of visibility. She still knelt on the ground, staring what was left of Biff, unable to think of anything of anything but playing with him in the most twisted ways.
Foster appeared but, luckily for Biff, missed him. Instead, Foster just scratched his head.
"What the?! I coulda sworn I heard those kids," he said, then adding, significantly louder, "You're lucky I didn't catch you! You better not make another peep or I'm coming back here!"
And with that, he wandered off, leaving Karyn desperate and unable to say a single word.