Many Pensics ago, a friend of mine and I were searching for a world class lush. He had staggered off somewhere. There was a ditch full of water, and we were afraid he'd fallen in.
Then we passed a portable sanitation unit, and heard a wretch retching. We knew we'd found him. What he didn't know was that he hadn't locked the door. The person who opened it got caught in a blast of barf.