Film ideas for exhibition

We've been thinking about different elements to use for a film/viral for a while now, today's ideas are getting people to upload their own 10-30 seconds onto vimeo/youtube and which can be embedded in their project page on the website. These could even be edited and played at the reception/waiting/cafe areas of the show.

This website gave us some great ideas: http://www.someoneoncetoldme.com/  people could hold up worded cards, like in these films. 

Then I thought we use a small blackboard to get answers to questions we ask, so we could say something like, what have you learnt from the MADS experience, then capture everyone's answers, like this... this was.... What stops you from being active?...