I saw a switch backflip and an underflip thrown at a spring rail jam over a barrel bonk. I've seen sicker things but thats the first thing that pops into my mind.
russ henshaw trapezoid, 360 switchup, switchup, 270 out... annnd a snowboarder in mammoth who did like an off axis 180 double nose grab/rocket air tweaked to the fuckin max, he like pulled his grab to his head!