I bet
it's a pain in the arse filming his scenes.
They've got to film them all 15 times, and edit them so that they only get the bits where his head is sticking out the top.
(
HP hasn't been here in aaaaaages,
Thu 22 Jan 2004, 10:45,
archived)
they film them all upside down
so his head's hanging out, then turn the film over so it looks right
(
new_matt,
Thu 22 Jan 2004, 10:46,
archived)