[wjnc]

I'm a worrier about things like these. I always imagined that's why the roof in the bathroom is lower and curved. A lot less room for gaining vertical speed. So you'd be temporarily stuck to the ceiling and perhaps a bit dirtied, but less hurt than getting double struck by first the lockers and then the higher ceiling in the aisle.

[chrischen]

I think the parent is more worried about the dirtied aspect.

[yodon]

The roof in an airplane bathroom is lower and curved because that is the shape of the airplane.