1.   The doors slid shut behind them.

2.   This time, the other person gets out of the way and Helen makes it to the doors before they slide shut.

3.   As photographers jostled for a picture of the officers, the door slid shut, sealing off the rainswept street outside with a dull clang.

4.   Once, Anderson was trapped outside his hotel room with no pants when the door unexpectedly slid shut behind him.