I strongly suspect that you were right about one recent extremely high-profile coffin, though, and maybe other celebrity ones.
@PinkArt Another Torquay one: Fawlty Towers wasn't filmed in Torquay. The famous scene of John Cleese beating his car was filmed in a street in Harrow, north-west London. Also, when people hear "Torquay", they sometimes think it's "Turkey" pronounced wrongly. Adrian Mole misdirects a Turkish woman to Torquay in one of the books.
As for the classic "Channel Tunnel runs along the sea floor" one, you could be forgiven if you ever visited the Channel Tunnel exhibition (now long gone, sadly), which had a massive model railway of the two terminals, and the tunnel itself was transparent, and ran next to a fish tank to represent the sea.
As for misunderstandings of mine:
One sometimes said in TV shows about the law: "She was his coke and spiriter." (Co-conspirator)
"The ponies, they laugh at what you say." (The point is, they laugh at what you say, from the song "Bad Day")