"Columbus sailed the ocean blue in 1842!"
What the hell? If he'd been a little off it wouldn't have been so bad, I myself don't know the date off the top of my head (then again, I've only been in the U.S. a few years), but he named a date AFTER 1776.
He spoke 100% unaccented English and I doubt he was not an American citizen.
I was overcome with giggles and had to quickly duck into another room.