I did not find this glitch all credit goes to Panther Hall.
I do not suggest using this on pc, because you will most likely get banned.
Video Tutorial of glitch (Not Mine):
Steps:
1.) Enter a 3v3 elimination game on Ecopoint: Antarctica
2.) Choose Mei as your hero
3.) Go to the Orangish spawn room
4.) Go to the side hallway
5.) Crouch on the top of the stairs (spot where the light grey and dark grey intersect)
6.) Aim your wall creator on the top of the stairs (spot where the light grey and dark grey intersect)
7.) Create wall parallel to the top of the stairs
8.) Jump towards spawn (away from hallway)
If these steps don't make sense watch the video above.
Video of me using the spot:
Credits: Panther Hall