You really thought that things would be different this time. You thought you would have a warm future with this girl. But the world is still cold. You need to get high but you only have three bucks. You could buy a joint, but the dealer would just give you a pinner for that and it would only net you a mild buzz. How much dope can you get for your mega-weapon?
You tell the dealer about your weapon and invite him over to check it out for a trade. He comes over the next day. You greet him and you blast a 20 miles per hour road sign into a twisted lump of slag to demonstrate its power. He loves it! This is what he gives you in exchange:
A hell of a trade you think as you roll a fat joint of the light green and smoke all your cares away.