I had also got used to the idea that here [in the UK] you can make quips all the time and in America that can be very dangerous. I wrote about it in one of the books. Once I was going through customs and immigration in Boston, and the guy said as I went past "Any fruit or vegetables?" and I said "OK, I'll have four pounds of potatoes if they are fresh" and it was like he was going to take me off and pin me to the floor.
Interview with Stanford's Newsletter (June 2001)