With the coming of Cataclysm (9 hours 3 minutes and 21 seconds from when i wrote this) We are obviously going to be acquiring the new smoke bomb ability, and that got me thinking...
I don't care what the situation is, and it might even be overkill, but this macro will let you get away NO MATTER WHAT! as follows : (choose to put sprint in if you want or not, i personally want it for further running away tactics )
/cast cloak of shadows
/cast smoke bomb
/cast vanish
/cast sprint
this macro assumes smoke bomb isn't a global cooldown....