I think I agree somewhat with points made by everyone:)
I agree with Jerry that there is a quick turn of Jackie’s head in approx 1/2 a sec between z160-170. However, this may be some other noise than a rifle shot. It could have been an actual motorcycle backfire.
I agree with Mr. Collins opinion that a shooter in the SE window could possibly have taken shots from a seated position on the box nearest the pipes and was able to lean back and remain out of sight during the Hughes film segment of the JFK limo approaching TSBD (including turning on Elm st.) If he did so, however, then the WC theory for the box on the window ledge being used as rifle test is improbable. And what about the shell ejections? Do they fly over top of those stacked boxes if shooter fires from seated position near the pipes?
I agree with some of Andrew Masons reasons for his theory of the shots fired in a very brief few seconds, in the 1....2..3 pattern and the 1st shot actually IS hitting JFK Imo, however, That 1st shot is at Z223 rather than earlier because of the tree, although the Willis girl head turn after full stop, may indicate slightly earlier at z205 perhaps in coincidence with Willis photo taken and just after Betzner photo at z186 approx. This spacing coincides fairly close to Harold Norman’s impressions of the shot spacing and his stated observation of hearing 1 shot, then saw JFK “slump” then heard 2 more shots after that.
I agree with the general SBT being plausible But only IF BOTH Connallys legs are turned towards the limo door in effect approx 45 degrees as with his apparent turned shoulders and face turned also rightward. In this position, the hat is held upside down with the right hand on top of the outer rim of the hat keeping it pressed down on top of his left leg. The well of the hat is thus hanging off the Left side of his left leg at the time of the Z223 shot that (Imo) DID penetrate thru JFK and still had enough momentum to penetrate thru Gov. Connolly also. The projectile, however, was probably NOT CE 399 as no bullet experiment except for perhaps the one with 36” length array of sideways glued 1” pine boards , produces an MC bullet with such minimal deformation as CE 399 .