I'm a newbie at this kind of thing, so when I heard about it.. I wanted to tell you guys. This was tested with 34 volunteers that claimed to be lucid dreamers. Some of them spun around in their dream, some of them rubbed their hands, others did nothing. 91% of the people who rubbed their hands got an extended lucid, 96% of the ones spinning in their dreams got an extended lucid, and 36% of the ones doing nothing got an extended lucid.

Oh well, for you people who actually get lucids reguarly, tell me if it works!