I think Hush in Africa is pretty ridiculous. A dark tightrope walk through a small cavern, with lava drops nearly everywhere. You can grind the ridges, but some ridges literally lead you directly into the chasms. I've come close to throwing my controller a few times.
Am I crazy? Did anyone else have difficulty with this track? Which ones have frustrated you?
Edit: Btw, I've got plenty of room for SSX duders, so add me up if you want, GT: Skillface