Zapruder frame Z-242 appears to show Chaney's left red flashing light on
his motorcycle.
Jerry Logan first pointed this out to me.
It confirms Chaney's motorcycle position in relation to the SS follow up car and Hargis and Martin.
there has been some debate on the forums regarding Chaney's "actual position on Elm st", as seen in Altgens 6 at Zapruder frame z255 (12-frames after Z-242)
Zapruder frame Z-242 shows Chaney's LEFT side red flashing light, i have done a small GIF to demonstrate it.
Z-242 Frame over Altgens 6 shows the position of the red flashing light seen in the Zapruder frame in relation to the red flashing light seen on Chaney's motorcycle