Battle of the Mounds, baby. Containing "The Prayer."
Just Askin': What the hell was the point of those spikes? To break gently at the slightest pressure? They seem less like obstacles and more like a manner of softly breaking an opponent's fall.
But I suppose we shouldn't question greatness too closely. Otherwise, we might get to asking what the hell is the point of the big reinforced-bus gate to the Oil Pumping Town in Road Warrior, given that the rest of the town has no walls around it whatsoever.