A Scotsman, an Englishman and an Irishman want to get in, but they haven't got tickets.
The Scotsman looks around, picks up a manhole cover, tucks it under his arm and walks to the gate.
"McTavish, Scotland," he says. "Discus," and in he walks.
The Englishman looks around, picks up a length of scaffolding pipe and slings it over his shoulder.
"Waddington-Smythe, England," he says. "Pole vault," and in he walks.
The Irishman looks around and picks up a roll of barbed wire and tucks it under his arm.
"O'Malley, Ireland," he says.