Collapsible/mobiles homes

Here we'd like to showcase the innovative collapsible/mobile dwelling solutions that are already on the market. 

Habitaflex (Canada)
 http://www.youtube.com/watch?v=3C2ufYuoauQ

Arkistruct
 http://www.arkistruct.com

Dynamic GlobalRDSS - Rapid Deployment Shelter System
 http://www.youtube.com/watch?v=bdDNFLx7hIw