Haha, there sure are some colorful personalities out there. Who knows, maybe the person documenting this guy's takes respects his sheer brazenness disguising it as idiotic memos!
And for what its worth, laughing like a retard swimming in pudding isn't something I have quite heard of yet-only joking! It gives context to an almost vile way gleeful beings can get during express moments, creating memories and mental stacks off odds occurrences.
We all do silly and strange things sometimes if given the opportunity to be just completely unguarded by society's judgements -though trying this attire with cops in close alleyways when shotguns clang willy-nilly really works wonders if you play your tribals wisely ;)