Sit on the splits right between the two walls. You need to get to the very top, but the walls can be glass or with sharp spikes, where twine will not help.
Secretlab Titan Evo Lite in Charcoal Blue SoftWeave Gaming Chair - Reclining - Ergonomic & Heavy Duty Computer Chair with 4D Armrests & Lumbar Support - Dark Grey & Blue
GTRACING Gaming Chair Fabric with Footrest, Big and Tall Game Chair High Back Computer Office Chair with Lumbar Support for Adults, Ergonomic Swivel Game Chairs with Pocket Spring Cushion Gaming Black
Sweetcrispy Computer Gaming Desk Chair - Ergonomic PU Leather with Comfy Lumbar Support, Height Adjustable Rolling Desk with Flip-up Armrests, for Home and Office