U-Turn. A team may only utilize its U-Turn ability once every race, except in The Amazing Race 29 and The Amazing Race Canada, when teams can use it twice if they choose. Teams are notified of an impending U-Turn either before the leg, as they leave the Pit Stop, or when they arrive at the Detour... The U-Turn is a crucial part of many races. Often, one team will be in danger of being eliminated before another even knows there is a problem. If a team wishes to give another chance at winning, they must perform a U-Turn on that other team. The first team to use their U-Turn advantage wins the game. Although U-Turns were originally used to let two teams race each other for last place, today most U-Turns are done in order to give another team a chance at winning. The only real exception is when a team uses their U-Turn on someone who is in danger of being eliminated before them; in this case they are trying to save themselves time by eliminating the weakest link in order to win. This rarely happens though; most commonly U-Turns are used to win the race. There have been several instances where two teams became embroiled in a rivalry with each other during the race, which eventually led to one of them using their U-Turn on the other.