Daniil Kharms! He wrote totally insane surrealist avantgarde literature. Witty child hater. Hoho. I accidentally found his stories when my girlfriend's friend showed me a book of Kharms' collected short writings. I recommend Kharms for everyone. Hilarious stuff!
This one is my favourite.
Here are some more writings. Especially the beginning of Symphny No.2 is golden.
All the stories are absurd and no matter how grotesque some of them are, they are still funny and on some writings there are good criticism on society hidden behind all that insanity. Charmingly intelligent nonsene. I'm a fan!