Not so much a 'thick comment', but a story of a passenger and her attempt at using the loo. My brother is a 737 pilot and this story was told to him by another pilot (pre 9/11 'locked cockpit door policy').
Deepest Africa, rather large lady asks where the loo is and is directed towards the front of the aircraft. Now she was soo large that the only way she could fit was to drop her underwear and 'back into' the cubicle.
So there the pilots are, flying away, not taking much notice of the cockpit door being opened on a regular basis. But this time is different, one of them happens to look around to see a somewhat large 'rear end' approaching them in a rather menacing fashion. What could they do, they couldn't 'tap her on the shoulder', they just had to 'cough' rather loudly until she realised the error of her ways.