Suddenly the disc jerked in mid-flight then hung and dangled. Thereafter, just to encourage players to use ribbons, we have authored the J-Bird rule. There is no 2 meter rule penalty if your disc is hanging OB solely by the ribbon. But, of course, we stroked J-Bird. The other discovery combats ice.
Ice is a big problem.
Consider a tee pad spotty with snow. Under each bit of snow might be ground or might be ice. If you land on ice with your plant foot you may be rewarded with a terrible drive and a face full of snow. Even if you do not slip on ice, the fear of doing so can hurt your confidence and result in poor shots. The solution is strap-on ice cleats.