Philip“I don't understand the context, but what you have offered are good replacements for "assuming".
”
Well Dinah is Black Canary. In DC Comics the heroine with the subsonic yell.
And Clark... Well just plain Clark Kent.
So as you may have heard Clark has a superhearing.
And Dinah uses her yell to make Clark feel pain and he tumbles down. That is why she apologizes.
Anyway, thanks, Philip!