Measure how far an object falls

Hey
I have some objects (boxes) that falls from the sky to the ground and stack on top of each other. Now I need to measure if I remove boxes beneath one and the one above falls to the ground how long that box falls. Is there some kind of way to add a listener which will keep track on all objects and how many pixels they fall before they stop and hit the ground?

thanks for superb support in this forum. [import]uid: 22737 topic_id: 6139 reply_id: 306139[/import]

Just add a listener to the object measuring its starting y and remove the listener on the collision event with the ground [import]uid: 5354 topic_id: 6139 reply_id: 21174[/import]