You might think this glitch is lag but it is not. I know this because all of my friends also had this glitch.
You go to the ravenwood tunnel. Once you are inside ravenwood stop moving. Take a look at the ground in front of you. It shows a circle with all the elements of magic in it except balance. Keep walking over the ice picture. You will reach there and then teleport back and then reach there again and then teleport back again. It's like a barrier is blocking you and it will teleport you back five steps if you touch it.
IMPORTANT: Once you use this glitch and then you log out, if you log back in, it doesn't work anymore. That means it's a one time use.
Something to remember: I bet this glitch wasn't very helpful in game playing but atleast now you know. It was not meant to make your character better or cooler. It's just something you do for fun. Keep this in mind if you are rating my glitch.