Aim at Rob, think of something and pull the trigger

You shrug and raise the toy gun against Rob's back, who is too distracted by some Discovery docu-reality show to really notice what's going on. The gun makes a winny charging sound and you're about to think that's all it does when-

*ZAP*

For a second everything went white, silent and cold. It reminds you of Gandalf dying and reincarnating, before it quickly fades away, sounds and sensations returning to you as you regain balance after almost losing it. You blink as you rub stars out of your eyes, noticing that things are not what they used to be anymore.