Is this the sort of sequence you're looking for?

Link to video clip (MPEG format, 781KB)

I snagged it (the BVH file) off the 30MB Santa.zip mentioned above. Try to ignore the poor lipsyncing and shoulder mutations (the result of my poor character creation skills, not the animation file).

The one I used was sit02.bvh, by the way. The collection has almost two dozen animations of "walking up to a chair and sitting down".