Nothing. It's a free country.
Stand in the middle of the street. If someone yells, "hey, get out of the street" you're in the US. If they yell, "get out of the street, eh" you're in Canada
They picked random letters from a hat. C, eh N, eh D, eh
A man was telling his neighbor, 'I just bought a new hearing aid. It cost me four thousand dollars, but it's state of the art. It's perfect.' 'Really,' answered the neighbor. 'What kind is it?' 'Twelve thirty.'
A buck-an-ear
Nothing, it's a free country.