I absolutely love this movie. I have the DVD and soundtrack and basically have the whole thing memorized.
Spartacus was a movie that was set during the Roman Empire (gladiator times). Anyway, Kirk Douglas played the lead and he was going to be killed for something he did and the soldiers were asking all the people "Who is Spartacus?" because they didn't know who he was. All of the people at different times stood up and said, "I am Spartacus."
So that is what Guy was talking about. Oh and the movie was very popular in the 60's.