To get in the vent/passed warp, simply Bail Grind Set Cust Glitch the wall above the vent (pic 1). As you clip through the wall, use the sticky wall to get farther back in the vent (pic 2). Once you are a decent depth in the vent, simply drop down from the sticky wall into the vent and you'll be behind the warp and in the vent (pic 3).