Script review - "Mother" by David Aaronofksy (warning: spoilers)

I get why this is polarising - it's a bit wanky, it's very confronting that a baby is killed - but I'm surprised it got such squeals of shock. I guess I'm more used to it having seen all that "in your face" British theatre of the nineties and noughties. At least it has the guts to go there - and is full on and hard core and tries to be different.