Those two ways Haunted Mansion (Non-Playable-Character area) and Dance music lobby are two ways, but there is one more way way riding on someones yeti tracks or flume tracks (whatever its called). When your on yeti tracks keep clicking further down the tracks and you will speed up to catch up to someone, although this may back you up and send you to the entrance of the next room. When your taking a corner on the yeti tracks you can do the same thing clicking way in front of you constantly, and you will keep sliding sideways along the tracks. Not sure if other vmk members can see you going sideways but you sure will...