Saw your head off.
The Natural History Museum in London (whose idiot director tried a while ago to get rid of the great dinosaur skeleton that is its most popular exhibit) has gone one better: the BBC reports (so it must be true, yes?) that the museum has in its collection a number of ‘decapitated heads’. Not severed heads — that term was not used at all in the quite long news report — decapitated ones; the expression was repeated several times by several different people, so I suppose it must be what they meant.
I should be interested to hear from anyone who can tell me what a decapitated head is.