if you want to get stranded in a back-stab, put a piece of #12 solid in the hole and and push it in/pull it out a few times, until the stabhas weakened up, then tightly twist the strands and pushin, voila!

btw, I would never do this where it'll handle actual current, I was just playing with one of those ideal push-in connectors, and seeing if I could get a piece of stranded in witout a "beard"
-Will