All non-verbal of course since he usually does not talk to us, mere mortals. In this WSJ report some chaps analyzed Tiger's body language after a shot and drew some conclusions. E.g. He hits the drive and quickly grabs the tee off the ground = 320 yds, dead straight. Next he tosses the sand wedge into the dirt after the explosion shot fails to clear the lip = substantial unhappiness.
If i hit a drive like that i would be totally mesmerized and unable to move for 3 minutes.
More here with numbers and other data.