I've been thinking a lot, the past few days, about one-shot RPGs I might want to run. One concept that came to mind - the players are all real people who happen to dress up as superheroes for a charitable cause, raising awareness and collecting donations for testicular cancer or domestic violence or the environment or somesuch, and then some sort of crisis arises and they find themselves called upon to actually be heroic. I think I could have fun with that...