To everyone who took the time to critique and evalute and rehash the 10 whole seconds of me shooting the M-14, thank you for your comments. But...I'd also like to clarify what was happening in that video.
1.) M-14s are really freaking heavy, my arms were already tired, and I was fighting a bit of elevation sickness. Plus, you know...small Breda is small.
2.) Aepilotjim suggested I use a tactical, forward facing stance that I had never tried before. As you can see, it didn't work out that well and just happened to be caught on video. I thought it was funny so I posted it.
3.) I know I need to "lean into it." Boy, do I know. But try something for me. Stand up and assume the off-hand rifle shooting position. Now attempt to lean into it without bending the ankle of your front foot. Keep your foot solidly flat on the floor. Your ankle must remain at a 90 degree angle. Now add in recoil and a heavy rifle and attempt to maintain your balance.
4.) And, despite all that, I was hitting the paper and stepping back up, post-recoil, to try again.
5.) Same rifle, different stance: