Funny comic, but...
*Entering nit pick mode*
Mario was a carpenter before he was a plumber, that's how he got his start in Donkey Kong. Saving Pauline from the big ape, on a construction site. He also worked in a cement factory for a while.
He's also done the pilot thing before, as well. In Super Mario Land he used a submarine and an airplane, both with projectile weapons.
I wonder what a complete list of Mario jobs/hobbies would include? Juggler, referee, painter, athlete (tennis, baseball, basketball, hockey, golf, etc.), doctor, toy maker, race car driver... Good grief, I think only the fictional character with more jobs may be Barbie.