Why did I hit a golf ball twice in one swing?

[David]

I was at the range today, and I had an exceptionally good day. For the most part, everything I was hitting was great, except a couple of time I hit the ball twice on my iron swing, and it went 30 or 40 yards and flared to the left. I knew I hit it twice because of the way it felt; like i hit it once with the club at the normal impact position and again with my club extended when it is on the same plane as my knees. I guess this has to happen to you in order for you to understand it? Anybody have any ideas as to why this happened?

[Brad]

it normally does this when you swing your club very fast and it goes under the ball but the top of the club scrapes the bottom of the golf ball which causes your club to be infront of your golf ball after impact and sometimes the golf balls path is temporarily blocked by your golf club therefore it being hit twice.