Got a dented tin can, a cracked bottle, and some wire, you can hit ‘em for a bass drum, slap the bottle with a stick for a shaker, and bend the wire over the can like a makeshift bow to get that weird violin hum. The trick is to find the right tension—tighten the string with a thumbtack, slap the rim with a metal spoon, and you’ll have a chorus of clangs that’ll make the alley feel like a concert hall. Just keep an eye on the junk, the city’s trash is the best orchestra you’ll ever find.