1- a really big stupid muffler that is fitted on cars to make them loud even though they have a four cylinder engine that puts out about 100 hp
2- an at4 heat (rocket launcher) that alot of noobs use online.
whoah! look at that geo metro with that huge boom tube stickin off the ass of it!
i saw SafetyMan
coming around the corner so i busted out by boom tube and blasted that sack of shit