Hi, I am new to this forum and not a physicist by any means. I am a high school music teacher working on a special effect for our upcoming show. Long story short, I need the bird to fall off of its perch on a cuckoo clock, and it needs to happen on cue (one of the characters shoots the bird when it "cuckoo's". My thought is to put a very small (it only needs to hold the bird) electromagnet on the perch behind the bird (with the bird detached from the rest of the clock and a piece of metal attached) and when the bird comes out and makes noise to cut the power on the cue of the gun shot and as a result have the bird fall off. I am looking to purchase a small electromagnet, and by small i mean 1/4" diameter and no more than an inch long. I don't mind making one (although I am limited to doing it with a nail and a battery. My concern with the battery is leaving it on for an extended period of time (almost 2 hours with the clock on stage) before the bird needs to drop. Will the battery overheat and explode on me? If anyone needs more info, please ask. Not being a physics person, I don't know how much info you need to be able to answer this. Thanks!!!!!