I did something like that previous year with fireworks (not the exploding but the ones that goes in the air) after 10 seconds i heard "Hey, uehhh, what's this" a few gardens to the north. I went to them, told my excuse and the minifig only lost it's hairpiece (normal black hair piece, no big deal). But the undersides of the legs didn't click on studs anymore. My fellow minifig (i already gave him new hair) was a little bit deformed when hitting the barrier of sound (or the barrier from my garden :-D :-P ). So now i have one set of deformed legs, i think i will use them in a clothing shop.
The same day, 5 hours later, i went back to the shooting hole for the fireworks, and i saw the hairpiece was just there! Seems to be flowen off while taking off. It isn't possible, says my physiscs teacher, but it did.
So that's my story of shooting minifigs into space.
- RupeeClock