Comment: What puzzles me

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What puzzles me

about the photo is the vertical appearing plume of smoke that looks like it comes from the right hand side of the barrel only. Vented barrel shotguns that I am familiar with have rows of holes starting on both sides of the sighting rib on top and ending before the center line of the barrel. Smoke from both sides means that the rib should be somewhat obscured in that area, and there would be kind of a "V" of smoke begining at around 90 degrees to the long axis of the gun. I'm thinking Obama had this gun custom ported so it tends to naturally push left when fired. Maybe there are some smarter folks who can help me.