Have to agree his actions were highly questionable. I can see many possibilities in handling this, but 3 come to mind of the top of my head... Depending on how the interaction was up to this point, I would 1) If nice, friendly game call the TD after couple of minutes, and show real concern over his anxiety.
However, if we'd had legimate differences, then 2 options are... 1) Call the TD and make a big scene, not to complain, but to show those around how 'genually concerned' you are... or 2) be subtle and quietly ask if everything's ok. Then give HIM something to think about during the shot. Mutter some friendly advice as, "I understand the pressure of this shot. I find if I run my thumb alongside the grip as opposed to under, I shoot straighter."... "If I take my pinkie finger off the grip it helps tremendously"... or " I make sure my nose is lined to my left ring finger, that put's my right eye directly in line with the cue."
This is your baby, so come up with whatever you like. Again, the purpose is to shift all the time and pressure back o him. He can then react however he wants, I don't care. If he reloads and takes longer, I just add a few more hints, but keep everything on him. He may or may not shoot/ make the shot but you haven't got anything to loose. He started this train, not me...