This is the first comment on Pruden’s article:
“No shotgun has produced that much smoke since about 1880.
It is not possible to get smoke of any kind out of only the right side compensator ports.
Obama isn't shooting skeet, now I don't know what he was shooting at, but then neither does he...”
It is possible , but rare. A friend of mine had a shotgun that was ported only on the right side.
He was right handed and had a muscle problem. This allowed him to get back on target faster.
That being said His shot gun never generated that much smoke.