Sorry if this has been posted before couldnt find it.
Ive noticed that when you hold B (O ps3) and you turn a corner without braking your vehicle will skid round and looks like the brakes have been applied. This was on a motorbike i should say a Hellfury, not sure of it does this with cars.
Try it for yourselves turn the corner without your brakes on without the slow mo on and the vehicle will probably crash, it wont turn the corner properly. Now do they same thing with the slow mo on and you'll see the vehicle skid round even if YOU dont press the brakes and you hardly ever crash. Its much different