Bat rays bumping into you from behind on a night dive?
The sound of base cellos playing ominous chords while diving in waters known to be the grounds of great white sharks?
The thought of a packed large dive boat discharging the head on your head while swimming to the front anchor line?
Titan triggerfish during nesting season do it for you?
Sea snakes do you a treat?
Is there anything about or during diving that creeps you out?