Yep. Used to have a Norinco SKS. It was the first rifle I ever bought when I was in college. Solid, reliable shooter. Long gone now.
I remember playing around with it once. The action was locked back and I stuck my thumb into the empty magazine, pushing down the feed ramp and releasing the bolt.
Some of life's lessons are learned painfully.
You are joined by many in that lesson. I am not one but I have witnessed several at the range.