According to the latest conspiracy theory (seen via Boing Boing), there are enough anomalies in the alleged Berg decapitation video to make some people suspect it was faked. For example,
34) "Terrorists" were fat
Several of the men in the film were fat by Iraqi standards. If they were Feyadeen or Mujahadeen, they probably have been living underground since the first days of the occupation. Tens of thousands of Iraqis have been shown on news stories as they have marched and demonstrated. One would be hard pressed to point out a single fat man among these thousands.
On the other hand, see the fearsome iraqi militia
and an even more fearsome terrorist leader