I thought some of you might like to see this video of this gun being double discharged. The owner had just completed a bear hunt in Canada and all the guys with him wanted to try shooting it. This video is of the last guy up, and he puts two fingers in the gun, even though he had been told to only fire the front trigger. Luckily the gun was not hurt, but I can't say the same for the shooter.
This gun weighs 12 1/2 pounds and you can see where he almost looses control of it completely.
Bob

https://youtu.be/EPX3kaIPvIs