Locked a rear in the wet + dark + tinted visor once, that was fun
Went on a cruise with 80 or so bikes another time, day time and dry conditions etc, dude in front brakes real real hard for no apparent reason, I slam on the anchors and somehow manage to miss him. What I didn't realize til the last second was that my rear tire was making it's way around to join my front tire, some how I didn't come off and get crushed by the 30 odd bikes behind me...