Wall/Ceiling climbing: I see some tips about this topic
when I search the forum but no completed code. Will be great
if frazzle can post your code here. I think many people will
love you.

Camera tracking object without spin at 90 & 270
I found some members looking for a solution about this
issue and I've tried very hard to solve this problem,
still not success, have tried to use atan2(), still no luck.