Guy goes into a quiet pub and orders 5 pints and downs the lot in quick succession belches and orders 5 more. The landlord thinks it's great, improving his turnover no end.
The guy drinks his beers, maybe a tad slower than before, belches and orders another 5. He struggles a bit but manages to get them down. Another huge burp.
He says to the landlord who's getting ready to pour some more,
Do you sell shorts?
Of course says the landlord happily.
Well you better sell me a pair cos I just pissed myself.