Scenario: You can go back to the past and film one event. What do you choose?

Let's say you're suddenly given the opportunity to go back into the past. You're able to choose any time and any place on Earth. You are able to film or observe an event for five minutes (intangible, and you cannot be seen or heard by anyone). After five minutes you are automatically warped back into the present. You get to keep whatever footage you recorded.

When and where do you go, Southperry?