Throw jumps are "partner assisted jumps in which the Lady is thrown into the air by the Man on the take-off and lands without assistance from her partner on a backward outside edge". Skate Canada says, "the male partner assists the female into flight". The types of throw jumps include: the throw Axel, the throw Salchow, the throw toe loop, the throw loop, the throw flip, and the throw Lutz. The throw triple Axel is a difficult throw to accomplish because the woman must perform three-and-one-half revolutions after being thrown by the man, a half-revolution more than other triple jumps, and because it requires a forward take-off. The speed of the team's entry into the throw jump and the number of rotations performed increases its difficulty, as well as the height and/or distance they create. Pair teams must perform one throw jump during their short programs; senior teams can perform any double or triple throw jump, and junior teams must perform a double or triple toe loop, flip, or Lutz. If the throw jump is not done correctly, including if it has the wrong number of revolutions, it receives no value. Pair teams must perform at least two different throw jumps with a different number of revolutions in their free skating programs. A throw jump is judged as a jump with a higher number of revolution if it is over-rotated more than a quarter revolution; for example, if a pair attempts a double throw jump but over-rotates it, the judges record it as a downgraded triple throw jump.