Super Mario the PlumberHilarious:

there is very little evidence of Mario’s skill as a plumber

According to the instruction booklet for Super Mario Brothers, Mario is a plumber. He was working on some kind of plumbing job in Brooklyn when he got sucked down into the Mushroom Kingdom, where he proceeded to jump on pretty much everything he could find. It’s a very noble thing for Mario to do: leave behind his life in the real world to eat a bunch of shrooms and chase around a princess. I don’t have any problems with Mario’s lifestyle. The only problem I have with Mario’s story is that there is absolutely no evidence that he has any skill as a plumber at all. [...]

Over the years I’ve seen Mario do a lot of things. He plays golf. He plays tennis. He plays baseball. Hell, he’s even refereed boxing. And though all of these endeavors involve pipes in some vague, unexplained way, they don’t really inspire much confidence in his plumbing ability. He can hit all the amazing drives-down-the-fairway-trailing-rainbows that he wants; until he can get a showerhead to stop dripping after the water is turned off, he’s not really showing much professionalism.