when Marwood goes into the pub toilet and reads 'I FUCK ARSES' on the wall he then goes back out and tells Withnail "I've just been called a ponce" and then "balls to Monty" - Withnail replies "balls to Monty? I just spent an hour flattering the bugger!" -
are we to assume that Marwood just spent an hour in the gents bogs? Surely Withnail would have said something like, "Christ! where have you been Marwood?" ..except funnier
But in the time Marwood was in the toilet (about 20 seconds) Withnail is supposed to have got more drinks in, called Monty, spent some time flattering him and got back to the bar. Even though he's exaggerating, it's still impossible.
Right lads! Pack your bags And come aboard as we hoist the Black Flag...