[mrlmd1]

Getting "highsided" - getting violently thrown over the top of the bike when the back wheel regains suddenly traction and tries to straighten the bike out, and then having the bike come down on top of you after you hit the ground, sliding over the road. Very bad, dangerous accident.
Getting "lowsided" is sort of what happens when you brake with the wheel turned and you fall inside the turning circle with the bike over your leg if you can't get it out in time. Not as bad but can still lead to injuries depending on the speed, etc..