I'd say Phantom of the Opera would be his most WTF movie I've seen, but this one is certainly full of some WTF on its own, particularly where the chimp pulls a perfectly fine and clean straight razor out of a trash can. But Argento's never let logic stand in the way of a stylish killin'.

Where else can you see an insane serial killing midget rip off his own face while under attack by a swarm of bees? Fully recommended.

My favourite Argento film, for the soundtrack and the complete fucking nutsness.

EPILOGUE: The chimp ends up with a serious case of post traumatic stress disorder. He retires to a ranch in Texas. During a flashback he ends up ripping off the face of a woman and eating it.

Phenomena (doo doo, dee-doo-doo)

Is this the one with the kid with the really fucked-up mouth, near the end? Because that was pretty disturbing, as I recall.