So you can dunk the eff out of the ball twenty minutes and 1 second before tipoff, but not 19 minutes and 59 seconds before, because at 20 minutes the rim all of the sudden becomes susceptible to breaking and at that point in time it's too late to timely get a new one installed?
MIR, your blinding hatred of white people, Butch Redledder in this case, has caused you to take an unbelievably irrational and ignorant position regarding this archaic and seldom enforced rule from the pre-breakaway-rim era of basketball, back when pubic hair spewed from the confines of polyester thigh high form fitting shorts.
It's a stupid rough ridin' rule that is never enforced despite being broken 100 times per half. It's what jaywalking is, if jaywalking were enforced 1/100th of its current enforcement rate. Shut The eff Up