Twisted Gun sits on top a formerly strip mined mountain. It is wide open and the wind can be very crisp. The pins tend to lean and perhaps even put pressure leaning the cup itself sideways. Whatever the reason, the club decided to put in shorter pins [4 ft].
The result is a very interesting visual effect. From fairways, a large part of judgement of distance to the green is the angle of sky those pins occupy. When it is hanging in the sky, with nothing behind it, and is only 4 ft high, you will swear it is further away; being used to the longer ones. On the first hole that happened, I did not look for yardage, but pulled a 5-wood and hit the ball 50 yds (!) past the green!
Mystery solved? Well, yes, I knew intellectually that the effect was visual. But it was still kinda hard to adjust my body's desire to hit it longer than I knew it had to be. Odd effect.