In 1999 Dennis Lee did did a "Technology Tour" Show in 47 States demonstrating a variety of technologies. The star of the show was the Hummingbird motor, which he demonstrated producing 5 times more power (meaured in torque on a dynometer) than the electricity supplied measured electrically. The rest of the power provided was harnessed by the clever finessing of permanent magnets.
Then in 2001 a show was done in all 50 States demonstrating the 100% efficient magnetic Sundance Generator. People who came to these free shows saw:
You can see these demonstrations yourself by ordering a "Public Awareness Kit".