I had an 8 point chase a doe behind my stand last year and then stop at 15 yards. It was a somewhat more than quartering away shot, but still good. However, I had to turn to face the tree and bend over for the downward shot.

As I released, I felt something tug on my Primos vest and saw the arrow fly 3 feet to the left. The Primos vest has "pull tabs" on all of the zippers: 2" of cord with a plastic knob on the end. The tab caught in the lower limb of the bow, yanked the tab and zipper attachment off (I never found it), and caused the arrow to go flying. The buck only moved a few feet, but it was enough that I no longer had a shot.

Needless to say, I immediately go rid of the Primos vest. I purchased the HSS harness/vest instead: not nearly as much storage as the Primos but enough for my purposes and no tabs to snag on the bow.