What you need to know: All swings have a low point – a place where the club reaches the bottom of the arc of its movement. For the club to reach this point, you have to release the arms and hands. Doing this too early in the downswing can cause the club to reach its low point too soon.
If I keep my head down my friend tells me I will stop hitting the thin shot? Unfortunately, this is an overused treatment of a more complex problem, easily fixed with your own PGA Pro.
Can a thinned shot gain distance? – Yes, but undesirably so, and only on shorter shots. For example, if you had 50 yards to the green and you thin a wedge you could hit it over the green. Sometimes the thin shot can get lucky.