Get into low level dungeon (maybe bg) as a level 90

Just accidently stumbled upon this bug as i was boosting my level 60 monk to 90.

If you are queued for a low level dungeon, log out and boost the character and log back in, you are still in the low level queue and can enter it as a 90 when it pops.
You might be able to do this with a battleground, i don't see why not.

Hope you guys have fun with this too!