More "Dark Knight" stuff going on, and finally its getting revealing.

For several days now we've seen videos popping up on YouTube of passers by filming some sort of truck/Batmobile chase sequence that went on in Chicago last week.

Sadly most of them have been rather distant and offered only bare glimpses of anything involved. That changed today thanks to FOX News who has three clips of set filming, and this time we can actually see some real stuff going on.

Each clip runs about two minutes each and show off a sequence where the Batmobile chases a truck. More notable though is some good quality footage of Heath Ledger (possibly stunt double) in full Joker garb who's involved in the sequence on a skateboard of all things.

Click Here to head to the story and click the three thumbnails to check out the footage. The middle one contains the skateboard action.

More shooting of another Batmobile & Joker sequence starts up again Thursday. In related news, a spoiler-free script review is up at Batman On Film, as is a video interview with Aaron Eckhart.