Video of the Dark Knight Filming Today

‘Risk Productions’ reported the following about The Dark Knight filming today in Chicago:

Here is some footage of the Dark Knight filming w/ helicopter on Saturday in Chicago. Actual filming of a test item or something swinging down a rope between skyscraper and bank at end. I filmed this and captured it this afternoon. Filming wrapped around 3pm, this is all they seemingly did today on set.

Source: Risk Productions