Ingesting liquid, such as beer, while urinating.
For best results, being properly hydrated prior to attempting the human brita results in colored liquid being ingested while clear liquid being evacuated, thus the human brita.
Extra points for both input and output utilizing cups or glasses.
Dude, I didn’t want to leave my drink and the restroom line was too long, had to pull a human brita. At least I know I’m hydrated.