2003 - 2005: These years saw the development of variations including cliffhangers, cordovas etc. As well as the disputed 360s which some consider only off-axis flips. The backflip was perfected over large distances including over . In 2005 at the very first Dew Tour in Louisville, Kentucky, Travis Pastrana landed four backflips in a row. At the Denver Dew Tour in 2006, Kenny Bartram was the first to pull a one-handed takeoff backflip. In 2009 while filming for "Nitro Circus", Pastrana completed a backflip as part of a larger crossover jump, flipping over a number of riders below in the process.