Dilts, the missile blows up behind you because of it's low Stability. The more velocity you have (the more you pull the missile back), the more the chance it will blow up behind you, damaging your base thing. You can try to reduce this with stability upgrades or using less velocity.
Reminds me of a kind of dangerous, no holes version of pool. The missles are the white ball(s) and the enemies are the other balls. Or mabye it's just me?
Lol Gman awesome comment, I totally agree. This game should be deprived of it's arms and legs, just so we can laugh at it rolling around. 1/5 starzorz.