The answers:
1. 42 (see Hitch Hiker's Guide To The Universe).
2. Drowned!
3. God is an atheist!
4. There is a secret place where all the ballpens, keys, sunglasses ... go when you let them out of your reach for just one moment.
5. While speeding up to speed of light, your mass will increase infinitely, with it your own gravity force, so after some time Mars would land on you...

Andreas