I too remember when on a trip to mammoth caves, I fell into a ditch when answering somebodies plea for help. Had I not been an olympic level acrobat I would not have been able to escape with my life! In all seriousness, great game. My pet peeves are as follows
1: Why acrobatics? I mean does it look awesome? Heck Yeah! But the caves are the last place I'd ever imagine a person using this skill set.
2: if you turn around while close to a spike you die.
Other than that, Great game! I, like everyone else, loved the tumblin' animation.