I've just remembered another one:
I used to do martial arts in the evening twice a week, so one day I'm on my way back. The bus stop was on a high street, and my house was just around the corner. In order to get there, you had to cross a crossroads.
As I'm waiting for the pedestrian light to turn green, I hear yelling behind me, and a man absolutely SPRINTS around the corner, running down the road. He careens across the road, to where there were several businesses, and then VAULTS a fence, using it to get up onto the roof of one of the businesses and then out of sight. This all happened in about 15 seconds, I barely had time to register it.
THEN, a police officer sprints into view as well, clearly having been in pursuit of the first man. I just pointed in the correct direction, and got a nod of thanks. Never saw either man again, or found out what the first had done.