Issac Asimov was quite a punster. Long ago he judged a pun contest for Omni magazine. In it he gave what he called the only known example of a triple pun. A couple called the ranch run by their sons the Focus Rance because that was where the sons raise meat.
So I applied myself to the challenge (but never sent it in).
An ancient seafaring people made their sails from animal skins. No matter what size the sail they were always a perfect 30-60-90 triangle. They had learned that this was possible by always making the bottom edge of the sail 1/2 the length of the hypotenuse. We remember these peoples early trigonometric abilities every time we speak of...
a fur sail sine.
Rance=Ranch GEEZ!
I had to imbibe a little “Force Ale” before I could get that one. Way to go.
I was afraid hope that pun might set off a chain reaction.