Or he was so completely wasted/high he didn’t know any better. People jump off buildings when they’re high. They freak out and head butt things when they have the DTs. There’s any number of things this guy could have been doing.
Having watched many episodes of "World's Dumbest Partiers" and "World's Dumbest Criminals," I can confirm this.
More than likely he was doing one thing, performing a "self tune-up" to bolster his excessive force civil suit against the police.