Bryster, that's Gilbert and George. Lots of people seemed shocked by their general weirdness as much as anything they make :-) I just remembered Marc Quinn's piece called Self (1991). Over five months, Quinn had eight pints of blood taken out of himself and stored. Then he made a cast of his own head, filled it with the blood, froze it, and removed the mould. The 'blood head' was exhibited in a glass case on top of a refrigeration unit. It freaked quite a few people out. (I just love this stuff. You can tell, can you? :-)