If you could go back in time...   

I was thinking about this the other day, and was just curious to see what other people's responses would be. My question is: if you could go back in time and witness any event in history, what would it be? Even though the idea may be tempting to some I'm not asking what you would change, just what you would have liked to have witnessed. You are merely an observer and remember it can be anything.

Personally I find it difficult to decide on one so just to name a few I'd like to go back and witness: the beginning of the universe, the original Woodstock festival of 1969, what life was like on the Titanic and the night it sank, the building of the pyramids, and what it was like during WWII. I just hope no one says their conception. That would be... peculiar.