The muse can take, and run with, an interaction with two characters where one uses a superpower on another, and then another where a third party comments on it.
You need the superpower used, of course, and there to be no superpowers that would stop it. (Precognitive police, perhaps.) Then you need to decide what powers would enhance this world, and which just clutter it up.
You need a social set-up such that the third party has a chance to comment. Perhaps a figure of authority, or perhaps the supers are powerful enough that they are their own authorities. Depends on the comment, too. . . .
And while setting up the events leading to the first, and then any bridge, and then any subsequent action, more powers may prove necessary, or unworkable, or the social set-up needs to be elaborated, but it's all about those moments in the core.