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.