Levi LaVallee and Robbie Maddison have flown through the fog and across a 300-foot water gap to set world records for the longest snowmobile and motorcycle jumps.
LaVallee's jump of 412 feet, 6 inches on his snowmobile shattered his own record of 361 feet set last December.
Organisers said Maddison's jump of 378 feet, 9 inches broke his certified world record of 351 feet, 3 inches.
The two daredevils roared down long run-in ramps at around 160 km/ph and cleared the water gap at Embarcadero Marina Park on San Diego Bay.
LaVallee jumped off his sled and Maddison popped a wheelie after they'd landed safely.
It was 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.