How would you be able to check the physics stats of a physics entity, such as mass and elasticity? For example, if two entities collide and they need to check each other's mass, how would you do this? Also, how can you check if an entity is a physics entity at all? Sometimes if im not careful i get "not a physics entity" warning when using events and i think that checking before to see if the event causing entity was a physics entity would solve this problem.