Lorry drivers problems

The container truck was making a very erratic run along the highway. It would travel about two miles then stop. Out would get Murphy the driver and he would bang fiercely on the sides of the vehicle. The police patrol followed him for about six miles and then pulled him over.

'We've been watching your performance, mate, and we'd like to know what you're doing,' said the sergeant.

'Well, officer,' explained Murphy. 'This is a ten-ton truck, and in the back I have twelve tons of pigeons. So I have to keep two tons flying all the time!'