What I find intriguing is that PH's bring some clients on follow up of the wounded DG along - expecting a client (some not all) that couldn't hit a game under "normal" circumstances to perform under pressure is a disaster waiting to happen...

Many clients don't train not nearly close enough to the minimum requirements - IMO as Navy SEAL saying goes is 100% spot on:

“We don't rise to the level of our expectations, we fall to the level of our training.”

Once you have shot enough (and that is a lot) it kicks in when needed.

Now - getting used to be close to the elephants is another thing - but this is usually out of our control so don't bother - it will scare you regardless

P.S. I was aware of my lack of skill when shooting moving/running game - so I have started to shoot sporting clays - competitively (it adds pressure) - I am shooting it for 11 years now and it makes all the difference - every shot now is almost completely subconscius and mostly spot on.