Not as bad as a new kid at the local fuel dock a few years ago....
Skipper wasn't paying attention as he was down below with his wife scrambling around getting things in order for their trip to who knows where.
New dockhand wasn't paying attention either, he was happily pumping fuel. The you hear "What the @#$$$" as the skipper comes scrambling above deck.
The gas dock attendant was pumping fuel into a rod holder. The deck was covered in fuel.
OR, the guy on my dock last year that came rolling in smelling like a gas refinery. He squeezed 20 gallons of gas into his freshwater tank. He found out when his wife was running the galley sink. I never asked him if he bothered to change out the pressure water pump and lines, or if he just flushed them out with water.