I am not exactly sure I would want most of my dreams or nightmares reenacted. Fernando Orellana and Brendan Burns have designed 'Sleep Waking', a humanoid that actually plays back sophisticated dream interpretation results, by analyzing data from a variety of sensors, and acts out whatever was going on in one's mind. Using recorded brainwave activity and eye movements during REM (rapid eye movement) sleep to determine robot behaviors and head positions, "Sleep Waking" acts as a way to "play-back" dreams.
Watch the video above. And you can see 'Sleep Waking' at the BRAINWAVE: Common Senses exhibition, open on February 16, 2008 at Exit Art.