you take a pack of metal sparklers(or a couple of packs, depending on the size of the explosion) and put them together and tape them really tite with electritions tape, a couple of layers, and leave one of the tips of the sparklers out above the rest about an inch and a half, you should tape all of thesparkler stuff, all the way up to the top of the sparkers. then light the sparkler that is higher than the rest and get the hell away.
i make 64 sparkler bombs all the time, me and this kid blew up a tv, and it went off before the middle one got down and he was 5 feet away and i was 10 feet it scared the shit out of us.
his explanation was right on., but if you dont understand,you take metal sparklers, doesnt really matter what amount, more is better. wrap them really tight with tpe (electric is best) top to bottom on the part that burns. leave one sparkler sticking up higher to at like a fuse. mkae sure that the top of the other sparklers is covered in tape so it will actually work
i've found they work better like this.
break off all the sparklie bits of the metal wire thing. put them all in a bottle. chuck a soda bulb in there too (two if ya feel the need). leave one out the top as previously said as a fuse
hint: if using a glass bottle stand heaps far back
'Remember, dont pull your dick out untill she asks, or sleeping, BAH' - Jay's little angel
'They call them fingers but ive never seen 'em fing......... oh, there they go' Otto in the stoner episode