Psionicists have discovered how to tap into their own psychic powers. They can manipulate matter, create fire, or control their own bodies with but a thought.

Brainburn: When a psionic character rolls a 1 on his Psionics die (regardless of his Wild Die), he is automatically Shaken. On a critical failure, the psi lets out a psychic scream that causes him to be Shaken along with all allies in a Large Burst Template who fail a Spirit roll. This can cause a wound.

Savage Worlds Deluxe Edition p. 119