I recently watched Skyfall again, and I've been interested in the Gunbarrel Sequence ever since. I haven't seen one, but is there a tutorial on the Gunbarrel sequence in Hitfilm?
Only one I can think of is this one (in German). Should be able to follow the screen. Really the tricky part is making the barrel graphic which can be done my masking a plane with narrow triangles then using the Twist filter.
Otherwise it's a fairly standard comp of the barrel layer over BG footage. The blood drip could be an animated mask on a red plane or a stock element.