Mazda Rotary Engine

Essentially a portable hand grenade. The apex seals are like pins of a hand grenade attached to a Schrödinger's cat resulting in an engine that it is in 2 states of reality; both working and exploded at the same time.

- Man, did you heard about the RX-9 rumors saying it will come with a mazda rotary engine?
- Yeah, can't wait until it blows up at the mall!