Havok Explosion
Not to be confused with the Havok game engine.
The dreaded Havok explosion (name comes from the Havok game engine), also called a "havok", happens often when you rip off an external component (or a whole set of components) made of an axle an a base, like pistons, axles, or motors.
It creates an invisible anomaly where the component was ripped off that behaves somehow like a landmine: when you come close to it, your bot has quite a high chance of being applied force in some direction, either making your bot fly or sticking part of it through the ground. Rarely, the same component can create several havok explosions.
Havok explosions range from a small push that will unbalance your bot and raise one or your sides, like if you were flipping a heavyweight with a Snapper2, to "teleporting" a bot OOTA (most likely just an extremely high speed propulsion that is so fast the bot goes through the walls)
Extremely annoying (if unfair) because it can make you lose easily, or funny (but still unfair) if the other bot havoks.
How havok explosions can ruin a match...
ALSO: Havok explosions can also occur spontaneously on bots that chain excessive numbers of motors,, use a lot of axles, or use a lot of pistons, even without losing a motor. The simple process of turning can send your bot flying.