how to stop particle rotation after collision

This is probably a simple question, but I have a simple particle system for shredded paper falling, and as it falls its set to rotate. I want them to stop rotating once they hit the collision plane. How would this be done?

I ended up using a sub emitter. If you set the sub emitter to spawn identical static particles on the death of the moving particle it will appear as if the particle has stopped moving when hitting the floor (collision plane).

Hey guys, so i’ve nailed down how to stop rotating particles upon collision using sub Emitters, here’s the settings to do so.
The theory is- Fire particles which rotate with speed, when they collide with the world, they die; which in turn triggers a kill command removing the particles from the scene.
when the particles die, the Sub Emitter spawns new ones which matches the rotation of the main emitter. By turning off a shape emission, they match the old translation.

hope this helps, made my brain fuzzy for a bit.

Check out my solution here: