Twice I've had young kids pull up next to me at a stop light in older cars that the have obviously been modified. They are very proud and sure of their "ride". After much reving the engine, glancing my way and meaningful nodding, the light turns green. And off they go...about 2 feet, when they stall the car!
As I pass at normal speed, I am seriously laughing out loud, which I'm sure didn't make their day any better.