My Car's Acting Up (Physics)

I love my car; driven it for years but, over the last few days, it’s clear that something’s wrong. No car acts this way so I have to find a shop, and fast. I’m new in town so I pick a name that sounds trustworthy and European: Schrodinger Auto.

“What’s the problem?” The mechanic asks.

“The car’s running fine; no crazy noises from the engine, no loss of power or control but for the last few days, whenever I drive it anywhere, people are honking at me and yelling because the car’s, well…jizzing all over the place.”

I expected him to laugh or throw me out but he runs to his office instead. He’s so busy calling all his friends to tell them the story that I can’t even get him to start in on the car.

“What’s the deal!?”

“Your car is in a state of superposition, you see.” He explains, “It’s both cumming and going.”