Love that idea, but there was something that just didn't sit right with me when I looked at it. It was really weird, as I didn't know what it was, but it had me the instant I looked at the image. So I looked closer and it looks like the "ejected" case is in fact a live round, and that it is "ejecting" from the wrong side of the pistol. Every semi-auto pistol I have ever seen or fired either ejects straight up, or to the right hand side of the shooter.
I see what you mean i got the same feeling, but after looking closer you can "think" that it's the dark shadowed hole which give the feeling that it's an alive one.
For the ejection side let say it's a DIY gun for left handed