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Exchange a few twenties at the bank for all $2 notes if you're in the USA. If you want to be an asshole, put it in a small box and start wrapping it with whatever you can - zip ties, dip it in a few layers of candle wax, a small bicycle chain and padlock, duct tape, hide it in a bigger box, repeat with that box and wrap it up a bunch, and finally throw it in a lockbox and give it to him with a small prybar and some other tools if needed. If he's the "punch the drywall because shits too difficult" type of NEET, just make it rain on him or something because he'll just get frustrated tearing into it and probably put another hole in the drywall.