Accessed none trying to read property from function: Noob physics and cameras?

Drag a wire from break hit results “Hit Component”, right click and select “Promote to Variable”, you can then give the variable some nice name. Then connect “Add Impuse” and “Set Collision Response to Channel” to that variable instead.

Additionally you should check that said variable is valid before trying to use Add Impulse and that other node on it though, just in case it’s not set by hit event yet.