I really like the use of multimedia on the social dynamics page, which is actually useful and relevant towards a visualization of what you're talking about (particularly the puzzle piece figures linking up hands when you reach the end of the collaborative rules). The layout of the headings and subheadings make everything nice and readable, too. Solid info and organization, though I'd try harder to explain why Invisible theater and the like are relevant to your original topic.

The accidental improv page is a bit messier organization-wise (and the comments and annotations on the page already reflect that). The topic subheadings are fascinating, and reflect things that I'd love to see some expansion on (such as contextualizing an improvisation, or improvising in ta crisis). The youtube links all just direct me to youtube's homepage, though, rather than a particular video.