That your 8 iron doesn't go 170, and therefore 200 out is not 5 iron, especially if you're hitting your second shot on a 370 par 4
That your drives don't go 250
That my drives aren't going 300
That when taking a caddies not every wind is "hurting"
that your caddie, despite what he tells you, can't tell you "what it's playing," unless you hit it exactly on the trajectory and curve he's expecting
That uphill putts require more stroke than you're going to use
That downhill putts require less stroke than you're going to use
That your L wedge should only be used when no other club will do, or better yet-left in your garage, or traded for a 9 wood
To hold your finish on putts.
How to putt from off the green
Where the practice green and practice bunker is
How to hit a punch under a tree with a lofted club from the rough-not your 3 or 4 iron.
That a solid shot from the rough with a 7 or 8 iron goes significantly farther than the duff you're about to hit with a 4 iron(and not to confuse the fact that your delicious 8 iron you just hit 170 because of the flier/roll is not your 8 iron distance(see above)
How to hit a fairway wood from the rough
Where to buy a 5,7 wood and/or a 9 wood and where to dispose of your 3 hybrid
That if you're 150 to the water and laying up not to hit your 150 club "easy"
When you decide to lay up-LAY UP
To stop pacing off your putts
Not to use your laser inside a roughly a 3/4 wedge-use your eyes-that lazer won't figure temp,altitude, uphill, wind, lie, stance, ability, attitude, creativity, intuition
How to get it on the green from 15 yards with at least 9 different clubs
Why you don't walk to the ball from your cart, caddie or bag with just your SW and putter(see above)
How to hit 5 or more different clubs 50 yards
How to hit 5 or more clubs 100 yards
How to hit 5 or more different clubs to a target of unknown distance inside 3/4 wedge distance
How to get out of trouble in one shot
How to judge distance BEFORE you use your lazer to confirm-soon you will barely need it
How to hit a 1/2 shot
How to hit a 3/4 shot
How to practice full swings at 1/2 speed
How to make a perfect slow motion practice swing
Why a pro can do absolutely anything new or unusuall when you ask him to it do at 1/2 speed OR with a half swing, despite it feeling "uncomfortable"
That staying "still" won't actually result in anything happening
That things with their "head down" get eaten in the wild
That should pretty much put me out of business without me ever once looking at your "swing"
Where 95% of new students want to work