This injury is common with Olympic weightlifters whose pulling power is not the best, forcing the weight cleaned to bury them deep in the hole, leaving them no option but to bounce (usually more than once) to free themselves out of that deep position. At the time when the adrenaline is pumping, one does not feel the damage, however later on at rest, all comes back to haunt tat lifter. The patellar tendon tear more than often occurs in competition, and you can hear the pop/tear! I don't understand the second part of your question Repacked.