Seconds to death

You found Genka the Sapper, but it turns out he stepped on a mine, and it's ready to go off if he moves. You should help him, or you'll never know the code to the Iron Forest bunker.
== Walkthrough ==
After talking to Genka, the timer will start. You'll have to set him free in 8 minutes somehow. Genka can be set free through the dialogues, during which groups of mutants and bandits spawn around. The last group is two librarians.
Upon killing the last mutants, talk to Genka, and carefully read his explanations, then make the right dialogue choices according to his explanations. If you do something wrong, the mine will blow up and the quest will fail.
After freeing Genka, talk to him about the code to the Iron Forest bunker door. He will answer with a puzzle, which can be resolved into 4815162342.
== Notes ==
* "Typhoon" Turret will make this quest significantly easier, as it obliterates packs of small mutants in a couple seconds.
* This isn't mentioned anywhere in the dialogue, but after this quest the [ shack at the dock cranes] will be unlocked, with huge amount of ammo spawned inside.
== Bugs ==