1. What a lug-handled lamp is. Granted, this is random archaeological jargon, but you attempt to explain what a lug handle is to a couple of Italian archaeologists hanging on every word and see how well you do.
2. After learning that Italian children play "C'e lai" (tag, you're it!), I mentioned that we have a game called Marco Polo, played in a pool. I was asked, "Does the next person say, 'Cristoforo... Colombo...'?"
3. As an ever-diligent representative of my culture, I taught the following song to my roommate and his friends after dinner: Beans, beans, they're good for your heart / the more you eat, the more you fart / the more you fart, the better you feel / so why not eat beans for every meal. It went over well in English and, surprisingly, even better in the Italian translation. I also learned the Italian word for fart.
It was a good day. :)