Last night, in my 2.5 hour, 300 student criminology class, several students ordered pizza delivered during the middle of lecture. I thought it was pretty funny. When the class realized what was going on, these guys had several hundred pairs of jealous, hungry eyes looking at them.
They even were so kind as to order me a personal-sized pepperoni pizza. Given that it's hard to eat & lecture (goodness knows that I've tried), I waited till break. Then, as I sat down to eat a slice (and it was really good!), I noticed that one of the students had written his student id on the side of the box.... By sheer coindence, that's the exact same number I use to keep track of extra credit assignments. Now that was funny.
I'm not yet at the point where I give extra credit, but I did end up letting class out a little early because I got very thirsty.