It’s all in the name.
Get a group of your friends together (or just 1), look for a place (store, statue, park) in your town that looks beat up or super dirty, wait till the middle of the night and powerwash the hell out of it. Post pictures to #raop
Record reactions from locals the next day.
Bonus points if you have a super quiet but powerful powerwasher or can figure a way to keep yours silent (like having it in some specially designed soundproof cocoon. Or, just do the powerwashing randomly one morning. Hose outlets are in more places than you think and you can string as many hoses together that you could imagine.