Hmmmm...

A .223 green tip placed into the engine block could put an end to that nonsense pretty fast. You could always claim that the bang was the machine backfiring just before it decided to disintegrate. Don't worry, the green tip will self-annihilate after doing its job so the only evidence will be that light blue puff of smoke coming out of your bedroom window. <img src="images/graemlins/smirk.gif" alt="" />

I love the smell of gunpowder in the morning!