I showed the gentleman all the respect and attention thatn he and his hat deserved, and was amazed at the wealth of knowledge he had.
He finally asked if I knew what the greatest percentage of steel was used for in the world.
I thought for a moment and said:
"Nope" he shot back.
"Then what?" I asked.
"Bottlecaps" came his reply.
I couldn't help it. I coughed into my hand and said "Bullshit" at the same time.
No disrespect intended of course.