I thought it was pretty stupid of Jack to give Michael the only unloaded pistol and then just say, "Oops, guess I forgot to load one." That should have been a tip-off to Michael that he wasn't trusted and that something was afoot with at least Jack if not all the rest of their group.

__________________
Things fall apart, the center cannot hold;
Mere anarchy is loosed upon the world,
The blood-dimmed tide is loosed, and everywhere
The ceremony of innocence is drowned;

--Lines 2-6, "The Second Coming" by Wm. Butler Yeats