I completed the first 22 seconds completely by myself. It was my assigned sequence and apparently the strongest (gets hit with a sledgehammer for blowing own trumpet). The third and final sequence (everything from the door opening to the end) was a bit of a disaster. No-one had edited together the final sequence and many individual drawings had not been completed.
While the first sequence had been thoroughly planned, the third was entirely improvised, and was probably why it was weaker.