Solar death ray (for cooking hotdogs)

Nym writes – “Some folks from the Alternative Energy Zone have built a giant solar death ray for… cooking hot dogs. You can try it out for yourself this year at Burning Man if you head over to AEZ. Warning: Do not look into beam with remaining eye.” – Link.

Related:

• Made on Earth from MAKE 03 – Reports from the world of backyard technology, including a shopping cart go-kart, the “Solar Death Ray,” a demolished house sculpture, a gas tank bass instrument, and some seriously big speakers.
• Solar death ray – Link.