DIY Solar
Many of us have seen solar power plants of this type, and making primitive versions of these mirror dishes was the goal for some of us, for example this case where a guy used a satellite dish to fix a lot of small mirrors on its surface. Now we see how a mirror dish focuses the solar radiation, and it is obvious that this point will have a high temperature, which can set fire to wood, or blow something up, or melt metal.
Credit Sergiy Yurko