How did you go to the bathroom during any of your missions?

Going to the bathroom can be totally similar to the way it is down here. The bathroom is designed very much like the architecture of a bathroom down here. You can use that in zero-gravity very similar to the way you do here, because we have air flow to entrap the materials, control them, and bring those material to the right place. However zero-gravity does give you the opportunity to do things in a different orientation. You can go to the bathroom upside down, you can hook your toes to the top of the bathroom, and do things that way. And so that's one of the opportunities you have up there, that would be kind of disastrous down here