I honestly don't remember anymore. I seem to recall it's sized for Jedi Outcast multiplayer, something I never really got into back when the game was new (and have no idea if anyone still plays). I saw it and grabbed it for LJ because, as you say, it's amazing.
My best guess as to what's happening there is that when you leave Kyle alone for a little while with a gun in his hand, he goes into an idle animation. With a laser sword... well, see for yourself.