In that movie it shows at the Press start screen when you just let it sit there, it shows the punisher in the Central Zoo level, next to one of those pillar torches that have the spike jutting out from underneath them. It then shows the punisher pick up an enemy and impale them onto it. I have stood next to one of those things with a thug, executed him next to it and even thrown him onto it and nothing happens. I also saw a screenshot of the Punisher cross dual weilding one of those mini assault rifles and a pistol, but in game it only lets you dual weild weapons of the same types. Last but not least, on another forum, I heard that in the zoo level, you can walk over to some darts with an enemy and the punisher will shove them into thier face. I have not seen any darts in this level so I don't know what they are talking about.

Maybe something they took out of the game?