He heard a sound behind him, knew someone had slipped through the door.
But they all slip through the space created by the first of its type.
He slipped into the kitchen through the door next to the men's room.
I went to him and slipped my arm through his.
As he turned away, she slipped her hand through his arm.
I slipped through the door that the Government man held open for me.
Before he could reach her she had slipped through the door.
She slipped through the glass as if nothing was there.
She slipped a hand through his arm, and together they stood looking at the picture.
Only those with a certain pass could slip through the lines.