I took a visit to the Captain America set on Stanley Dock in my home town of Liverpool this morning. Never seen a movie set before so it was a good (although short) experience. They were filming some sort of car chase/stunt scene involving a yellow cab with someone on top of it holding on for dear life.
I have uploaded the video for all to see at CBM.com:
It looked a lot better than my camera makes it look. While I was there I heard the security staff chatting away, and one of them was telling the others Samuel L Jackson had arrived (in Liverpool or on set wasn't specified though).