Call it a glitch. Call it an exploit of new game mechanics. I call it hilarious and awesome!
Thank you YT user MAST3RLINKX
It appears as if the player leaps into the air with Yoshi, extends his jump with Yoshi’s special ability, then quickly dismounts/remounts and uses Yoshi’s special ability again. The timing on this kind of jump would have to be difficult to master at first, but can allow you to get to otherwise unreachable areas (like the top of a volcano, as shown in the video).
I’ve had a blast with this game (as with most Mario games). How has your experience been?
-SnowytheGeek [via Kotaku]