ha, I'll try to upload the video of my girlfriend shooting the 12g for the first time (the only long gun she has shot before that was a .22, so she was very used to no recoil)... I'll have to look into that.
The hardest kick I have ever experienced is from my Mossberg 835 with Winchester 3.5 inch Turkey Magnums. That combo does not make for a fun day of testing loads or sighting in. I even had my shoulder against a tree when I fired it once. I will never make that mistake again.