While the Odessa steps sequence may be the most famous example, Eisenstein
continued to use that technique, at least in the beginning of _Ivan the
Terrible, Part I_. It takes alot more screen time to pour the bowl of coins
over Ivan's head than it would have taken at the correnation.
Speculation: if speeded-up action, as in Keystone Cops sequences, is for
comedy, does slowing down the action, whether via slow motion or repeated
action, suggest the opposite (whatever we want to take that to be)?