> the intention and the purpose of slamming on the brakes is obvious: to stop the car. Not always, often it's to slow down or to control or initiate a drift.

> the intention and the purpose of slamming on the brakes is obvious: to stop the car. Not always, often it's to slow down or to control or initiate a drift. Hard braking can be done to warn a tail gater to back off, it's also done to sharply reduce speed when headed for a kangaroo or other road hazard .. even though the car can't be stopped in time the aim is to shed speed while staying straight before a probable impact and to increase the time for the animal to move. If someone is racing on tarmac or rallying on dirt they might practice BLAT - Brake Late, Accelerate Turning. When driving heavy or articulated vehicles drivers will brake and downshift on down grades to shed speed and not lose control to mass and gravity. Perhaps purpose is harder for outsiders to deduce.