1.   Barry popped his head round the door to say hello.

2.   Joe Longthorne pops his head round the proscenium arch on the way to his dressing room.

3.   Once, the doorkeeper popped his head out and asked if they wanted to hand in autograph books.

4.   I popped my head round the door once or twice.

5.   Do you want to pop your head in and say hallo to my girlfriend?

6.   Linda was just taking off her apron when Carol was the next person to pop her head round the kitchen door.

7.   Lindsey was putting the finishing touches to her notes when someone tapped at the door and a dark-haired girl popped her head round.

8.   Zoe popped her head round the door.

9.   She started, straightening up as Jill tapped and popped her head round the door.

10.   Eventually tracking down some bottles of alcohol in the kitchen, she popped her head back around the door to ask Ross what he wanted.