I have to admit, I sort of giggled when it jumped out.
It seems like it has to do with the eject lever. Does the lever move as a symptom of the escape, or a cause?
ETA: It moves down up ejects the cam then down all the way... it -seems- causative...
Re: A, wouldn't they all jump out then? or do you think the white cams exert more pressure somehow?
B: Plausible.. Could be leftover goo somewhere...
C:, I've never liked that release lever, it's too variable. The 2 I've had here (the 750 languishing in the basement and the 758) both have had variable release lever tensions. Neither ejects a cam though.