These are not used in BGII - but I suspect the information was just ripped from AD&D rules without thinking about the fact there was no application for them in BGII. I've often thought it would be cool if you could climb stuff though...
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Time is an illusion. Lunchtime doubly so.
Epona of The Laughing Hyenas
Proud winner of the 'Most Useless Post 250 Has Ever Seen' Award 2001. "I'd just like to thank my friends and family, without whom none of this would have been possible..."