I've been riding again for two months after thirty years. Today in a left hand turn lane traffic ahead takes off and the pickup in front of me jams on his breaks when the turn signal goes yellow. I always use both breaks, but locked up the rear. I was so surprised that the rear skidded left leaving me out of control. Luckily I was able to not hit him and keep the bike from laying down. I thought that if I'm going straight, and locked up the rear tire the bike would continue to go straight. What a surprise!