i can vouch for this.
it's very rare.
(Quatermass and teh Shit, Tue 15 Jan 2008, 1:04, archived)

Do I detect a wobble?

( Lisette von Falcon, Tue 15 Jan 2008, 1:05, archived)

i don't think so

(Quatermass and teh Shit, Tue 15 Jan 2008, 1:06, archived)