and example w/strangers

This looks like it was fun for everyone involved, and there were so many skill-sets utilized! (I would embed it if I could, I promise):

http://www.commarts.com/interactive/cai11/video/bludot-vid.html

World: has problem
Person: thinks of experiment
Architect: designs sweet chair
Friend: loans rapist-van
Graphic Designer: makes fake logo-magnet-disguise
Cartographer: decides where to drop chairs
Photographer: films
Stranger: picks up free chair
Nerd: make GPS tilt-switch (smart!)
Technology: tracks person home
Interviewer: conducts interview
Photographer: films interview
Stranger: provides interesting insight, etc.
Stranger: gets free chair
All: uplifted

How can we get that stranger involved?