It makes me crazy when I hear people say that it takes special skills to improvise.
It just takes the right situation, the right opportunity and the right attitude. Given those conditions, anyone can improvise. What gets improvised may be more or different from what you expected.
How about an applied improvisation game that involves moving around a space, adjusting for other players, finding new situations and avoiding crashing into each other?
Jane Wolfe recently led a workshop where she taught the game Bobsled; she learned it from me, I learned it from William Hall at the AIN Conference in San Francisco in September, 2012.
I appreciate the shout out, and her story is very cool. Improv with the Visually Impaired.