He listened carefully as the sound crept up behind him.

He creeps up behind her, you know, and then lets go.

I was creeping up behind them softly, that they might not hear me.

What have I told you about creeping up behind me?

Then gradually he heard her creeping up behind him, and soon she was in front.

The way you crept up behind him and put your arm around his throat.

It was half an hour before he sensed two more people creeping up behind him and sitting down.

She crept up behind the boy and raised her Bible into the air.

Then he slipped out of the bush and crept up behind him.

It is always better to turn round than to have anything creeping up behind your back.