Humiliskate

''"Cortex takes a dive and Crash jumps onto his back, transforming him into a makeshift sled. Did Cortex trip, or was he pushed?" -Crash Twinsanity manual''

The Humiliskate is a move used in Crash Twinsanity, where Crash rides Cortex like a snowboard down a steep hill. Humiliskate is used in the level Slip Slide Icecapades and Rockslide Rumble, and is similar to the game mechanics to that of Crash riding a warthog or Polar, whereas Crash is still vulnerable to obstacles, like holes and Nitro Crates. If Crash crouches, Crash and Cortex will build up more speed.

Trivia

 * Evil Crash attempts this exact move after he kidnaps Nina, but instead uses her to travel through the level. Also unlike Crash & Cortex who can get harmed from the hazards in their way, he doesn't and can even attack some of the enemies as well.