Answer: Displacement
Explanation: Displacement could be referred to as a defense mechanism which involves the transfer of aggression, emotion or tension from the source to a target, the target usually is a less threatening target. In this case, the target here is the locker door. Displacement usually takes place when faced with a unhappy situation and rather than attacking the source, the tension of the disappointment is vented on a less threatening target. The outburst which ensued by kicking the locker which is less threatening target and not another athlete or coach who could react.
