What happens when you discharge completely?

What happens when you discharge completely?
nearly complete discharge of the old pack

After some on line discussions about the effects of reverse charging the cells, and my experiment where I purposely reverse charged a cell to see what happened, and found little change in the cells capacity. I decided to take the sticks that I just pulled from my silver insight pack, and do an experiment.
This photo is the progression from when the discharger detected the first cell drop out in stick 3, until I stopped the discharge when the pack had discharged to 30 volts. We can see that the rest of the sticks gradually dropped out in a random way, with several of the sticks being completely discharged and reversed charged.