John Carmacks hobby
Well, as it seems, John Carmack is team leader and co-founder of Armadillo Aerospace, one of the competitors for the Ansari X Prize, which is offering $10 million to the team that successfully completes a low-budget private space rocket capable of carrying men into space.
...but, as it seems, they’ve had quite a bad day few days ago as their 48 inch vehicle crashed in a test-field…. link
a mirror of the crashvideo is to be found here
... imho another good reason to buy your copy of Doom3... don’t you think? (besides the fact that it’s a groundbreaking game)