This is an 1-frame improvement to one of the most unbeatable movies on TASVideos. The route I've selected is perfect in both speed and entertainment, at least in my opinions.
The improvement comes from the fish scene in 8-4, it was the faster-turning strategy that saved me 1 frame. That's one small frame for a level, one giant improvement for SMB history.
For more information, please see: http://tasvideos.org/1715M.html