Here's a movie scene burned into my brain: Harrison Ford, playing Indiana Jones, is on a chase through the streets of Cairo. It's in the original movie Raiders of the Lost Ark, which I saw as a kid. Today I couldn't tell you who was chasing whom or why, but I remember the climax. Jones is pushing through a mass of people when the crowd abruptly parts. He's confronted by a swordsman, who flips his giant scimitar around both artfully and menacingly.