Hammer bounce in true hammer actions?

Has any of the more technically minded people here researched the phenomenon of hammer bounce in revolving hammer actions? By revolving hammer I mean hammers that turn around an axle as opposed to plunger type hammers as in Crosman 1377 and similar.

Looking closely at a Gamo CO2 revolver and an older Crosman it looks like they have by passed the hammer bounce by using a transfer bar. On the other hand it might just look that way, and the hammer could be bouncing faster than the eye can catch it.