This is actually something we’ve been interested in doing for a long time, but haven’t been able to due to technical reasons (the avatars are all pre-rendered animation frames, and to add more animations like this would cause the memory usage to go through the roof). However, we’ve recently come up with an idea of how it could be accomplished along with improving the standard walking animations, etc. It is a pretty large project either way, and we are still assessing the reality of the idea, so obviously can’t give any sort of ETA or definitive answer on this one right now until we have time to explore it further.