How to be invisable!

This is the most complicated simple glitch in Graal that I know of. So to do this, you will need a partner, or if you're skilled at it like me, just a person there. So you go to the battle arena with your friend because thats the easy way. You should find a room with 0 people, or 1 person thats afk so it doesnt matter. You have to stand right next to the door. Your friend will join the spar queue or watever its called.  Then you quickly join it too and run out the door. If you did it correctly, you should be in the hallway and it should say You have lost the spar. When you click ok, you should be stuck for like a minute. After you can move again, you go outside and pick up a bush. Walk inside the battle arena and hide. Stay by the front door though so you can see what other people say. You will be invisable to everyone except you. I've almost been jailed for this though...