First of all, Van is the South African version of Paddy
Van walked into a bar and ordered martini after martini, each time removing the olives and placing them in a jar. When the jar was filled with olives and all the drinks consumed, Van started to leave.
"S'cuse me," said a customer, who was puzzled over what he had seen, "what was that all about?"
"Nothin'," answered Van, "the wife just sent me out for a jar of olives!"