Moore saw that shot-1 was when JFK was just past the signals, not when near the Thornton sign (the FBI wrongly mentioned the Thornton sign).
Hence in fact Moore confirms that Oswald's shot-1 was at say Z113 (or even earlier as per Holland).
Anyhow, JFK duznt slump here, but he raises his right hand/arm, koz small lead fragments ricochet into the right-back of his head (seen in xrays).
Hence, if the FBI were wrong re the Thornton sign, then we might add that it was the FBI that wrongly mentioned that Moore couldnt see JFK for the next 2 shots.
Or, Moore was wrong (if the FBI report aint wrong).
I doubt that Moore could see throo the 10 agents -- 5 sitting low, 1 sitting hi (Hickey), and 4 standing -- in Queen Mary!
Plus could he see throo the raised sun shades on the windshield.
Plus there is a serious crest, where Elm St starts to fall (5.8%), and hence Moore (standing say 60 ft east of the crest) has an effective eye height of only say 3 ft 0 in instead of 5 ft 6 in.
Hence Moore probly couldnt see JFK at Oswald's shot-2, at Z218, nor when JFK very slightly slumps after Z218.
Just before Z313 the gawkers standing on the south west corner of Elm & Houston run out onto Elm St (& Tina Towner runs out too), and hence they block Moore's view of JFK at the last shot(s) at Z313 & just before Z313, ie Hickey's shots-1234 & probly a shot-5, & possibly a shot-6.
And re JFK slumping, this would have been well after Z313, eg Z333.
No, Moore never saw JFK slump.