I have had it happen to me in the winter time with a frac fluid pump. Learned my lesson about the engine brake when it is slippery out that day. Nothing scarier than doing about 80km/hr in a 100,000 pound truck and somebody jams the brakes on in front of you and instinctively you let off the throttle and instantly turn the tractor around sideways. Thank god for the trailer hand brake.LOL