Not much you can say really except explain that it does happen occasionally. Quite pointless comment and just demonstrates that the guy didn't have any understanding of what he was talking about.
There is a story of a landing on a Trident with a person quite well known to the Queen on board. It is alleged that said passenger asked for a message to be passed to the flight crew telling them that if they had lost any undercarriage following their somewhat firm arrival they would find it buried up his ****!