Warp Effect
Before I start this tutorial and you see the outcome and think I'm crazy, I remind you that the warp effect is commonly used for "Guess the Person" and junk. ;D
Step One
Choose a picture. You may use mine to follow along.
Step Two
Then go to your Brush Tool, and choose Warp Brush.
Step Three
Adjust your settings to mine:
Step Four
Now, around the person's face use the warp brush to start messing it. Try doing it in circles for better results.