That's a lowside. Turn very gently if weather invites ice (or wet autumn leaves which are about as creepy as ice), never use front brakes.
Locking and then suddenly reacquiring grip on the rear wheel causes highsides on motorbikes, it's when you fly out of the seat and into the oncoming 18-wheeler. But it's quite hard to do on bicycles.
Fronts are useful when you have to decelerate rapidly while travelling in straight line, but in turns you just don't touch them ever.
edit: and on a decent motorbike/scooter you learn to not use brakes except in emergency, 95% of all deceleration is handled by just dropping the throttle.
Locking and then suddenly reacquiring grip on the rear wheel causes highsides on motorbikes, it's when you fly out of the seat and into the oncoming 18-wheeler. But it's quite hard to do on bicycles.
Fronts are useful when you have to decelerate rapidly while travelling in straight line, but in turns you just don't touch them ever.
edit: and on a decent motorbike/scooter you learn to not use brakes except in emergency, 95% of all deceleration is handled by just dropping the throttle.