This is a little badass gif I ran into which I knew was begging to have sound added. Please beware I only added the sound and made it into a mov. file.

EDIT: I actually know a little more of where this gif comes from. It comes from the Octavia mafia comic series and this gif is a scene from the comic.So to answer the question who are they shooting at it is the Flim Flam bros. This gif does not include the whole scene.

http://zedrin.deviantart.com/art/Showtime-338521362 Source of the gif made originally by Zedrin