After defeating The End by letting nature kill him, Snake defeats The Ladder and now has to climb a mountain to reach Groznyj Grad. After reaching the peak, Snake finds that the fastest route into Groznyj Grad is a tunnel underneath it. However, when he finds his way there, he finds The Fury waiting for him with a flamethrower and an anger-powered jetpack. After tranquilizing the shit out of him, Snake climbs another ladder and surfaces in Groznyj Grad. I find it ironic that the easiest Cobra for Snake to defeat was probably The Fury but he was actually killed 35 years later with a jury-rigged flamethrower composed of a cigarette lighter and an aerosol can.