I slipped once, giving myself the scare of a lifetime.

Stephen slipped once, but even that didn't slow them down.

"I slipped once in pregame doing the same thing," he said.

I slipped once, and he was beside me in an instant.

She nearly slipped once and a cold chill swept over her.

She turned and ran away, almost slipping once on the ice as he watched her.

To slip just once would let her end her life.

He slipped once, almost smashed his face on one of the steps.

He slipped once on the steep sides and slid almost all the way back down.

I slipped once and put out a hand to steady myself.