Figure 5: Frame of video, containing the image of luminescent cloud of explosion in air, initiated by ferrite surface. The outline of arrangement of ferrite piece (1) and two electrodes (2 and 3), connected to capacitors (charged to the voltage 440 V), is made with white lines over the image. Explosion sprang up, just when both electrodes touched the ferrite. A white arrow is pointing to the dark field near the middle of the cloud. It means, that, when the gas traveled from the plasma zone between the electrodes to periphery of the cloud, the luminescence intensity enhanced markedly in absence of electric field (that is: due to chemical chain reaction). Presented below experimental data point to chain mechanism of chemical reaction, connected with explosion in air.