READ THE MAN — before it's a quit or a fight

Measured against HIS normal, not anybody else's:
  [ ] talker gone quiet, or quiet guy gone loud
  [ ] talking faster / slower, louder / quieter than usual
  [ ] cutting people off
  [ ] jaw set, arms crossed, won't look up
  [ ] a scared question that doesn't fit his skill
       ("what if we don't finish this week?" from your best man)
  [ ] your own neck goes hot for no reason — then LOOK:
       who's clipped, who won't look up, who quit talking

What to say:
  Open the door:   "You seem off — what's going on?"  ...then shut up and listen.
  Too hot to talk: hand him the reset, circle back once he's level.

Say it to the crew:  "If I'm being a jerk, say so."  Make the call-out normal.