A South African, an Aussie and a Londoner were sitting in a pub having a pint of beer.
The South African grabs his beer downs it, tosses his glass into the air, draws a handgun and shoots the glass in mid-air.
He grins to the other two, puts the gun down on the bar and says:
"In Souff Efrika we haf so many glasses we never drink out of the same glass twice".
The Aussie then downs his beer, throws his glass into the air, grabs the gun off the bar, shoots the glass, puts the gun back on the bar and proclaims:
"Ay mate, in Oz we have so much sand which makes glass really cheap so we too never drink out of the same glass twice".
The Londoner looks at the two of them, finishes his beer, puts the glass down on the bar, picks up the gun, shoots both the Aussie and the South African and says:
"In London we have so many South Africans and Aussies that we never have to drink with the same one twice."