This one is courtesy
of Stefan Reinerink:
"In the "A kind of Magic" video, there is a shot of Roger
behind his drumkit in black leather before they are transformed from rags
to glam clothes. After this shot, Roger is to be seen in his rags again!"
And if you look carefully, you'll also notice that there's a clapperboard that hasn't been edited out of the video. It reads "Seq 8 Sc 36/37". It takes up an entire frame (but only one frame!) in the sequence where John changes from tramp to bassist. This is what you're looking for...
Thanks to Chris Rennie for finding and capturing the elusive frame!