OBJECTS TAKE TIME TO LOAD:
Some objects in WoW take longer to load than others, such as doors, barrels, mailboxes and crates. Occasionally you can use this fact to pass through these barriers. Simply log out of the game while on top of the object (like a mailbox), and you may be standing inside that object when you log back in. Push forward during a loading screen into a BG or Arena, and you may get through a barrier that is supposed to hold you back before the barrier properly loads (such as the pink bubble in Eye of the Storm, or the gates in Arenas). The use of lag, weather created by a program or by things running in your background, can increase the object's load time.