WOW: Share a Flying Mount and Exit Anytime

I just accidentally found this while doing the quest for the Rainbow Generator. When my friend caught the imp and mounted up, her mount would have the option to jump in, acting as if that was a multi-passenger mount. This mount also has the ability to dismount during flight.

1) Do the above Quest
2) Catch imp
3) Mount up
Now your party mates can jump on your mount.
*Works as long as you carrying the imp on your back.