We can see Ready & his 2 feet on the tarmac.
And in the top pix we can see Landis' face & his foot/feet.
Or, if that's McIntyre's face then its Landis' foot/feet anyhow.
I think we may be seeing the reflection of bystanders on the chrome running-board of the Queen Mary.
In the area between the wheels, we can't see any of the sunlit street beyond the JFK limousine and it had comparable clearance to the Queen Mary. Maybe the QM was slightly higher, but Ready's "legs" are in the chrome running-board. The Ready "leg" to camera-left doesn't move relative to the QM, and so is a part of the car.
The QM's running-board was catching quite a bit of sun as it went down Elm.