His clumsy thumb slipped from the lever.

Her thumb slips out of her mouth and she looks confused.

Her thumb had slipped from her open mouth and she was breathing evenly.

His thumb slipped into the corner of her mouth, pressed, parting her teeth.

He moved carefully, so that his thumb did not slip and he did not lose eye contact with the horrified woman.

I'd cut the power lead to this thing," he said, tapping the unit without looking down, "so they wouldn't get a blip if my thumb slipped.

Woods's thumb quickly slipped to the round weapon selection button on the stick and moved it to select Sparrow missiles.

Luke's thumbs slipped under the waistband of his trousers.

My thumb slipped and ran along the ripped can.