i encountered a glitch on 1 of the quarry missions where u deliver the 6 barrels of toxic waste or w/e to ur airstrip. when i lifted the bucket on the komatsu to deposit the barrels at the end of the mission i got a double insane bonus...
distance 6250, height 56, flips 0, rotation 1336.
unfortunately i saved game after instead of reloading and don't think i stand any chance of topping 1 of these records legitimately (certainly not the well over 1 mile jump distance).
oh well, after 100% i'll just start another game. 86.10% currently.
edit: topped the rotation... 1820 NRG off chiliad