Quick Time Events are scripted actions or events that produce various outcomes depending on the player. They require the player to press prompted buttons that appear on screen; failure to do so will result in either death or a slightly different outcome from that which appears if successful. When playing the mission Comrades, for example, if a player fails the two Quick Time Events in the bank, the script will still move on with Vladimir performing the action instead.
QTEs are available in both Singleplayer and Co-op modes of Battlefield 3, usually in close-combat encounters. They involve having players partake in hand-to-hand combat, defusing bombs, movement, and shooting.