Hi, i started speedrunning in Half-Life (NGHL) and i have problem with grenade, gauss gun and Vortigaunt boost, jump. At the beginning Of the game at/in Resonance Cascade we can boost to window via Vortigaunt and i can't do that. I try to do grenade jump in chapter "On a rail" and i can't. I try to find something but i don't find anything. Please help. Greetings.