FailBot has been retired, but EnsidiaFails has taken over! What remains the same is the humiliation that arises if a boss ability, if avoidable, is not handled properly.
In the Trial of the Crusader, the Northrend Beast Icehowl casts Massive Crash, which can send players scattered throughout the instance. If players do not move out in time to avoid the following Trample, the situation can become very messy (in both senses of the word!).