As for the black humor... I used to have a truly terrifying example of the Russian black humor, but I lost the original story, so basically, this is what it was about, in English.
A little boy comes home from school. His dad says, "let's go fishing". The boy says, "no, I'm in a bad mood, leave me alone" The dad says, "how dare you speak to me like this? You're coming with me!!!" The boy says, "ok"; so they get to the river, and the dad notices he's left the bait at home, so he says, "go back to the house and get the bait". The boy says, "ok", he returns to the house and sees the neighbor is having sex with his mom; the boy runs away to the river and says, "look, I saw our neighbor, and he said he had lost his axe; why don't you go bring him one?" The dad says, "hm, ok", he takes an axe and goes to the house; the boy outruns him using a shorter path, he goes to the neighbor and says, "look, my dad knows everything, he's coming to you with an axe, you see him?" And the neighbor thinks he's toast anyway, so he takes a shotgun and shoots himself; then, the boy goes to his mom, and says, "dad knows everything, he just killed the neighbor with an axe and he's going for you"; his mom sees her husband with an axe and thinks she's dead, so she runs out of the house, runs over to the pond, and drowns herself; then the boy waits for his dad and says, "you see what you @sshole did? mom said she couldn't take you anymore and drowned herself, even the neighbor said he couldn't take you either and shot himself". And his dad goes nuts, he runs into the house, ties up a rope and hangs himself... Finally, the boy is sitting on a rock and thinking, "was the fishing trip really worth it? I told him I was in a bad mood..."