Tcheser:
That's so messed up that it's funny.
Most of their humour is so messed up it's funny. For example, there's one where a little is saying "Daddy, there's a monster in my closet" and caption is: "luckily, Sally's door could from the outside - so I was safe", implying her father believed her about the monster and looked only to his own safety.
Another (along that same theme) has a father saying "How many times do I have to tell you that there's no monster under your bed? It's just a homeless man with a knife who hates you. Now go to sleep.".
canadianspankee:
but I must admit I did laugh.
is a common reaction to that web comic.
They also do short youtube sketches that are funny for the same reason. Not quite shock humour, but close.
Goodgulf