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					Originally Posted by Dante_P2P  No, Stefan said something about Z for the jetpack.... | 
	
 Possibly, but I think it's only used to determine whether someone is legible to take damage or not. For example, when you are using the jetpack but have only just begun to rise, you can still be hit despite being off the ground. However after reaching a certain level on the probable Z axis, it gives immunity to any kind of damage.