In StarCraft 2, you can press Ctrl+Alt+F to show your current frame rate, GPU temp, and (if any) stalls in the top left corner of the screen. I found out that if you hold Ctrl+Alt+F for 10-15 seconds, a creepy face showing a child's face right below the frame counter appears. It only shows when the counter is active, and can only be removed by restarting the game. It doesn't distract you from the game, but it's pretty disturbing.