Bolt bombs
Find the largest pair of matching bolts and nuts you can find. The thread should go all the way up the bolt. On one bolt screw one nut all the way up the thread to give it some weight on one end. Screw the other nut so it is half on the bolt half off. In the space in the nut pack it with the scrapings of as many match heads as you fit in. Screw the other bolt onto the nut so that the two halves are held together with the nut packed with scrapings.

Find a large drop onto concrete and release the bolt bomb and take cover. With luck the percussion will cause a horrific explosion and you'll spend the next ten minutes searching in 10 yard blast radius for the two bits of bolt for the next go.

In the absence of a wall advanced bolt bombers can tape the shuttle bit of a shuttlecock to the back of the bolt. Throw the bolt and the drag sends the bolt into a perfect parabolic arc to make contact.

And to think I used to make these when I was 10. I am surprised in hindsight that I didn't end up losing an eye.
(MagicMoose, Fri 10 Aug 2012, 21:42, 4 replies)

You realise this answer has been posted several times already, right?
(The Ghost of Stephen Foster, Fri 10 Aug 2012, 23:53, closed)

You realise you're stating the bleeding obvious, right?

(Misery McUglywife an attention seeking sociopathic fuckstain., Sat 11 Aug 2012, 1:21, closed)

I did this ONCE only
I was 13, the bolt exploded, half flew over our roof the other half hit me in the chest. I went down like a sack of spuds and couldn't breath for 15 minutes and had a bruise the size of my outstretched hand for 2 weeks.
(Captain Spacker I lick windows, Sat 11 Aug 2012, 16:58, closed)

I used to do this!
When I was a lad I worked at the West London Shooting Grounds as a "trapper" ie the poor slave who released clay pigeons for toffs to shoot at. Consequently my colleagues and I had access to unused shotgun cartridges of which the charge or powder proved most useful. At the same time as this, the A40 was being upgraded at Northolt and we used to steal the bolts from the arnco to make bombs but instead of match heads we used the powder. We got through many many bolts and the construction workers must have been very puzzled as to why they had to continuously replace bolts on the new arnco at the Target roundabout. happy days indeed....
(urgle-splurgle molesting small goats since, Sat 11 Aug 2012, 21:42, closed)