Heard But Not Seen

I was playing Hasentree Club golf course on the 6th hole. Card sheet said 160yds, calculated the pin to be 153. Placed my ProV1x on a low tee, took out my 7 iron and connected like butter. We heard it hit the pin, and didn't see a ball. I was a nervous wreck as we approached the green. Until we reached the cup with my ball sitting in it!