11.   I press the button that makes the garage door slide down.

12.   On most mini-vans, the single rear side door slides, although the large rear door of the Mazda MPV swings on conventional hinges.

13.   One door slid OK, but the other was stuck and dragged, and no amount of cleaning the bottom rail made it work very well.

14.   The doors slid apart to reveal Wynton Marsalis bopping in a way that looked like conducting and Seiji Ozawa conducting in a way that looked like bopping.

15.   The doors slide easier, on tracks integrated into the window trim.

16.   The doors slid shut behind them.

17.   The side doors slide.

18.   The round door slid open, an invitation to unknown delight.

19.   Then the door slid shut.

20.   Usually, the door slides effortlessly along the track to open and close smoothly.