Metal Gear Solid cast's curiously tense improv session

I can't quite figure out just what's so bizarre about this 15 minute off-the-cuff riff session with nearly all of Metal Gear Solid's voice actors (Debi Mae "Meryl" West was sadly not in attendance), but I'm pretty sure that it all boils down to Paul "Col. Campbell" Eiding quietly lording over the entire proceeding at center back.

Metal Gear Solid Cast Improv [YouTube, via Joystiq]