This was the 5th annual event in Boston which is also hosted in cities around the world. The video below is more cheeky than naughty (as we saw from the advertising) it is far less revealing than the billboards and signs you will see if you ride the subway in Boston.
Spontaneous cheers were regularly heard through out the subway from young kids. Parents were horrified to see their children run from them to hug and ask their favorite superheroes why they were in Boston. And security in the Copley Mall had all they could do to stop people from photographing the two superheroes who were walking to the post party at King’s in Back Bay.
You can learn more about the Boston Society of Spontaneity here.