Mousetrap + wheels + grenade = a racing bomb.

[Chike101]

I made one of these in middle school (sans the bomb, jeeze) and they can go pretty far on their own, depending how they're built. They would go about Hacked Mule speed, and I'd say, depending on how many rods/pipeframes/w/e, the distance it would go. (Longer object has string tied to it, winding up mousetrap)

There's the personal experience, and I'd like this thing ingame (with optional accessories such as bombs)