This is a case where the timing of the edit (plus some great acting) really make the spot work.
 
The script concept from CrispinPorter was already funny: A team of fast food action heroes in the style of a cheesy 80's television program.    

What gives the spot its punch is the way the edit creates a huge build-up and then pays off with a complete anti-climax.

In effect, it's a 28 second title sequence followed by a 2 second show.

See the spot   (8MB Quicktime)