Answer:
You could do this to a motion, see it on a watch, or place this in a race.
What kind of cup doesn't hold water?
What goes through a door but never goes in and never comes out?
Bobby likes Jimmy but not Joe, apples but not pears, jeeps but not vans, shinny but not hockey, tennis but not squash. Who will he like, Sara or Sally?
Why is 6 afraid of 7?
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?