After that, angle the pallet next to the cart of Hopper mines, and then put the pallet at the proper angle, GBBH (Grenade boost back hop) hit the pallet, jump off it and air strafe into the entrance. There are some rocks in HL2/HL2E2 that have a proper su

ABH is the ability to jump backwards and gain incredible, unnatural speed. Hl2 and Eps, Portal 1 - NOT Portal 2, L4Ds, TF2 or Counter-Strikes Gmod has been patched.

Accelerated Back Hopping (ABH for short) is a Glitch, and it's the main method of movement on OrangeBox Engine-based games. ABH replaces Bunnyhopping , which was fixed in the OrangeBox Engine. It is also significantly faster than bunnyhopping.