I'll use Paul Merton as an example:
He's dressed as an airline pilot and is telling a story...
"You know, fog is the worst thing to happen to a pilot" (pauses) "Well actually, the worst thing to happen to a pilot is that he's eating a bowl of rice pudding and it suddenly turns into a leopard".
Like the OPs salad joke, it's a play on the figure of speech ("the worst thing..."), taking the literal meaning instead of the implied one.
Sorry that I didn't quote it verbatim.
He's dressed as an airline pilot and is telling a story...
"You know, fog is the worst thing to happen to a pilot" (pauses) "Well actually, the worst thing to happen to a pilot is that he's eating a bowl of rice pudding and it suddenly turns into a leopard".
Like the OPs salad joke, it's a play on the figure of speech ("the worst thing..."), taking the literal meaning instead of the implied one.
Sorry that I didn't quote it verbatim.