The International Skating Union (ISU) defines a flip jump as "a toe jump that takes off from a back inside edge and lands on the back outside edge of the opposite foot".
[2] The origin of the flip jump is unknown, although American professional figure skater Bruce Mapes might have created it.
[4] Writer Ellyn Kestnbaum calls the jump "somewhat trickier than the loop for most skaters.
considerably more so than the salchow or toe loop",[5] because of its unstable inside edge and the precision required to align and time the jump's vault from the toepick.
[6] Kestnbaum also states that it is crucial that the skater's edge not be too deep, but instead almost forms a straight line.