Get a Hold of Yourself, Man!/Tabletop Games

Tabletop RPG
"A smack across the face brings your ally back to his or her senses."
 * Fairly common among the Imperial Guard of Warhammer 40,000. When they're not being executed for cowardice, that is.
 * Only War, naturally, has several variations of this. Ranging from the Sergeant's Sweeping Order "Snap Out of It!" (shouts at all subordinates within communication range and if does it right, Pinning or Fear effects on them end, so they may act normally from the next turn), and up to Summary Execution by the Commissar that motivates the rest. Plus several combat drugs.
 * The Player's Handbook 3 for Dungeons & Dragons 4th Edition includes Skill Powers, such as "Snap Out of it", which is pretty much this trope.