Be careful with those things! I hear that they are very dangerous. Archimedes says that with a big enough one, he can shift the Earth around. I'm very afraid of accidentally sending our planet hurtling off down the wrong path in orbit!

Imagine being that guy:
"Why is it so unseasonally cold Mary?",
"Well Jane it's because some moron called 'A Bit Brainless' disrupted our orbit while making dinner last Tuesday",
"Oh really? What a prize wombat this fellow must be!".

It would be most embarrassing!