I was playing single player CoD Blops, because playing multiplayer doesn't count I assume and I forget. I was fighting some enemy of America or another, and had the choice to throw back a grenade, so I started throwing it back and it blew up in my hand.
Then the nerve killing part was when the game happily told me "Look for the grenade indicator to know when grenades are near" I almost threw my controller at it, so I respawned almost right before the grenade was thrown, and just took cover behind a wall and laughed at the enemy not knowing Mason can see the future.