Only Jonas isn't there. He's undeniably present right up to the moment blade should make contact with skin. Then he's just gone.

Rather, he's standing several feet away, but with David's back to him, it's probably hard to notice him before he fires a warning shot. The M16 is in his hands now, though there couldn't have possibly been enough time for him to dodge the attack, let alone unsling his weapon.

"You don't win this," he says. Unlike David, he's still willing to talk. He could have had a clean shot, but he didn't take it.