Re: I object to stupid people
In the sketch the guy got into the cupboard/chest/etc whenever someone said 'mattress' I think and to get him out everyone else had to get into the fishtank and sing Jerusalem.
So yeah more of a getting into the tea-chest moment really, thinking about it, but the fishtank is a funnier image and no-one would have got the reference without that! (Apart from Hardline Python Fundamentalists, of course, who, it is rumoured, cannot suffer to see an image of a dead parrot ;o)
Facepalm for remembering it the wrong way round!