Probably just my English sense of humour being a bit too different.
You know the English reckon that Americans don't get irony...is this true?
After all Alannis Morrissette's song "Ironic" was the most unironic song ever...which is in itself ironic!
As is a Canadian demonstrating a stereotype of Americans.

I think plenty of US-types
do get irony, but not so much the louder, more shouty types you often find online which is probably why the stereotype persists.
Edit: er, not that I'm suggesting that 'Gator there is necessarily loud and shouty; I didn't quite get the joke either but such is the peril of a mostly text-only medium, as I've discovered to my cost in the past. More than once.
Further edit: which I think is me missing the point again. I should shut up and find another thread to infest!