User blog comment:Kogath/Monster Hunter 4 Ultimate for the Nintendo 3DS/@comment-21371438-20140129090108/@comment-184612-20140129104711

With Daren, it forces you to fall into the sand if you don't hold R to keep your balance. The trailer you're thinking of was the very first trailer for the game, full of stuff that didn't make it into the full game. Tigrex is VERY good at climbing walls.