improved version of the spliterbark skip.
the first nail hit doubles as stopping the splinterbark from floating anywhere which can ruin the first bait, and getting it to die while on your way up/killing it quickly if you decide to do the tornado pogo. you need to stand outside the large rectangular hitbox near the bottom of the splinterbark and walk back into it for the first bait. if you stand in it without reentering it can delay the bait and mess it up. see clip 2/3 for hitboxes. you should do the second bait once the splinterbark is parallel with the slope. you can either opt for clip 2 or clip 3 as your way to get up. clip 2 (the tornado attack pogo) is faster but a bit trickier, some may find it easier. try experimenting what you are more comfortable with. if you miss the pogo on the tornado attack you will pogo the parry which can also get you up, but it loses a decent chunk of time and you need one more hit to kill the splinterbark. if you do the tornado pogo version, you need to upslash him on your way down
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