NO
Yes, they have a strong grip on their claws that lets them peck on trees while hanging upside down.
Upside down, everything will be upside down and messed up, because the brain would be damaged. P.S : Watch MEGAMIND and HPOTTER7
There is something wrong with the watch.
No it has not yet, but you could possibly build it on your ceiling, but it would never work out the way you would plan as a regular toilet. (but technically a space toilet could work upside down)
No it is really not possible
Fill one empty bottle partway with water, take a second, identical empty bottle and connect it neck-to neck with the other bottle. The are special connectors for doing this, but duct tape can work if you don't have one as long as you hold on to that part. Once they are connected turn the whole thing upside down and briefly shake it in a circular motion. A "tornado" should form in a couple seconds.
Talk to the dealership to work out finances
You have to go in from the trunk and work upside down.
Usually a small metal ball blocks the opening (by gravity). The hamster pushes up on the ball with the tongue, allowing water to fall around the ball.
Yes, as long as it is positioned upside down from its proper upright position
A 10W hydraulic oil will work fine. Your local auto parts store should have it.