A guy walks into a bar one night, and arouses the curiosity of the barman by constantly talking into his hand. Finally overcome by curiosity, the barman asks the customer what he is up to.
The guy explains that he has a new ultra modern mobile phone that consists of just a small dial embedded in his palm, and a microscopic microphone transplanted into his thumb.
After his initial suprise, the barman goes back to serving the customers, noticing that the guy had disappeared.
Finally at closing time the bartender is locking up, when he find the guy in the toilets, bent over a sink with his trousers around his ankles and an empty toilet roll shoved up his arse.
"What on earth are you doing?" asks the barman.
The guy looks up with a pained expression and says..."waiting for a fax to come through".