I can use psi to choke people and generate heat. These two things are the only things so far I can do with pure psi other than a psi ball. When I try to do both at the same time (choke + heat) I create a really big psi ball. When I make the really big psi ball I can visaulize it blasting and I can shoot an orb of heat energy. If I visualize it charging I can slowly choke someone as the blast gets more powerful and then the orb releases a small push. It seems to affect people but not inanimate objects which is still confusing me. I'm going to make a page about this shortly.