A ramp surface, in half life is quite dear to the element of ABHing. It basically lets you go flying in the air if you hit it correctly and that the surface is the right type. In episode two, you can use this to grenade boost back hop (which i'll talk

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.

I recently completed HL2 and I want to try some tricks. I tried ABH but it didn't work for me (using latest steam version). I wonder whether it is just me being bad at it or something's broken/fixed.