...some idiot who probably was driving slow in the far left lane, then saw his exit as he was on top of it, so he stopped (0 mph) waiting to turn right across all lanes to take that exit. Normally I wouldn't say "you can't believe how many people had to slam on their brakes to avoid an accident," but you probably can. That person should have lost their license on the spot. Six months later they can retake driver's ed, then visit the DMV for both the written and driver's test.