This story on io9 details how a great number of the citizens of Seattle and the Make-A-Wish Foundation helped a kid with liver cancer to be a superhero for one day.
This not only involved Electron Boy racing to the scene of the crime in a Delorean on a closed road with police escort, but a chance to save a sports team and have a showdown at the Space Needle. If this doesn't make your eyes sweat a bit, get on a transplant list, because your heart just doesn't work.
My hat is doffed to the creative and compassionate people of Seattle for staging a city-sized LARP for a great cause!
Update: more details in the Seattle Times story here: Apparently, the villains (Dr. Dark and Blackout Boy) taunted Electron Boy via the Jumbotron at Qwest Field. Classic.