>>4955364If you don't cover the top rope with your arm, you'll slide under the rope and it will bang your head on the rebound.
Your head will already be in a whiplash position when that rope comes crashing down.
Some people have broken their necks just because of this.
It is the yardstick, the benchmark, the #1 high risk problem that tells everyone in the business that you're a colossal dangerous shitter.
