If your in combat and your pet is to but you want to leave and are to lazy like me to kill the stuff attacking your pet you can use this macro to mount up while your pet holds agro.
Code:
/petstay
/cast Feign Death
/petpassive
at this point use your favorite mount (land or air) and run away, the mobs will leash and your mounted without agro
if the mob has an aoe effect this will not work but the same concept will, put pet on stay, walk away, FD, put pet on passive then mount up.
i was not sure if this was an exploit or not so i put it in this forum, feel free to move it.