Originally Posted by
Redlands
The CCTV looks no better even when slowed a little, although the white flash appears to begin prior to the tin foil going poof.
The camera used is not fast enough show anything significant during those 3 frames, other than the position of the vehicles at the moment of the explosion. In particular, the second frame doesn't prove that the flash came from the bottom, or that the vehicles were intact at the time of the flash, as some may think. It's most likely a rolling shutter effect. Meaning the camera sensor scan position was towards the bottom of the sensor at the moment the flash happened, and the top part of the image in the second frame was recorded before the flash.