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Robbie Maddison of Australia in action during the Red Bull XRAY freestyle motocross competition at Razorback Ridge, Picton on on September 12, 2010 in Maldon, Australia.
If all goes right on New Year's Eve, daredevils Robbie Maddison and Levi LaVallee will roar down the takeoff ramps on a motorcycle and snowmobile, respectively, fly over a 300-foot water gap and complete their record-setting jumps.
The side-by-side jumps at Embarcadero Marina Park on San Diego Bay will be the latest in the "Red Bull: New Year. No Limits" series.
LaVallee, of Longville, Minn., was scheduled to attempt his snowmobile jump last New Year's Eve in snowless San Diego but was seriously injured in a crash during training two weeks earlier.
He wants to break his record of 361 feet, set hours before his painful wipeout.
Maddison, an Australian who's a veteran of eye-popping New Year's Eve stunts, wants to jump 400 feet, which would break the record of 391 feet for the longest motorcycle jump.
Copyright Associated Press