Why Does Jamie Bell do That Little Dance???

I wonder? Why does Jamie Bell do that funny little jig/dance after he has taken a photo of the corridor; and then put that same photograph in front of the surveillance camera in the office corridor?

The little dance he does is almost like a "Fingers up" at the 'authority' -- as if to say "Yeah we have done it -- and -- you can't seem me!!!!!!!"

But at the same time I wonder if was somehow written into his contract that he has to do a little dance at some point in any film he does??? He did the same thing in "KING KONG" (2005); and of course his "trademark" is dancing; as per the film that brought him to prominence "Billie Elliott" (2000).

What are your thoughts on this?