True, but it's light years away, relatively speaking, from a disc being tucked into the abdomen/chest area.
That's because it's pecs and obliques vs lats and rear delts. It's mirrored, just with an opposite direction of arm movement. The point isn't that it's being tucked into a power pocket. The point is that it's mirrored in as much as the human body is capable. It's the same swing, just mirrored and using different arm muscles.