you can already do this with events. just name a brick for your bomb, then event another brick near you so that when you click it, it emits/kills explosions/zombies/players
ask around how to event, cuz i don't have time to waste my life telling you how. Oh crap! This took like 2 minutes! Now i have to go find a way to get those minutes back <runs away and calls a scientist to get his 2 minutes back>