Generate smoke when mesh gets hit/moved

[cb LLC]

Can we have an option for mesh to produce smoke (brush/inject) when it starts moving (animation keys or gets hit by other mesh)
In the image attached you can see train going backwards and hitting rocks. All rocks start producing smoke even the ones that are not hit yet making it unnatural.

I know you can have multiple PHX sources but then you have to manually time when each rock gets hit to produce smoke.

thank you