I am having trouble making a stalactite fall when under. It sounds easy but I am having trouble making it work. I would like to make something like the example below. When crossing the X of said object set its active state to move in +Y. But I also don't want all of the stalactites to move and I also don't want other stalactites that could possibly be on a platform below fall if their X is the same. Do I need something more complex? I thought about making a invisible volume box that spans from the ceiling and finds where the ground is. I am unsure how this would be done though. Could someone point me in the right direction? thank you.