What you will need:
MUST be level 70 (if you're a Druid, level 68)
The ability to FLY (flight form or flying mount)
A computer with WoW installed (obviously)
What this bug/glitch does:
This bug/glitch gives you the opportunity to stand in mid-air... doesn't really help in any way, but it's funny with people running around yelling "OMGWTFBBQ HOW U DO THT TEL ME PLX QQ!!111!ELEVEN"
What to do:
Step:1: Mount up onto your FLYING mount. Fly up a few yards.
Step:2: Type "/logout"
Step:3: Right click on the Flying Mount buff icon next to the minimap
Step:4: Voila! You are now standing in mid-air.
NOTE: You will only be in the air for the 20 seconds it takes for you to log out. If you cancel, you will fall to your doom... ^_^ Also, when you log back in, you will fall. DON'T SAY I DIDN'T WARN YOU!!
!!!HAVE FUN!!!
thanks to Reshnaak