I found a bit older video from a commercial fire in North West Austin Texas. I beg you to stick with the video. It is as bad as watching paint dry for the first 4 minutes, but I promise things dramatically change. Watch how the smoke evolves as what appears to be a very dark scene lights up. During the fire, the facade on the A/B side collapses and traps two firefighters. You will see thier fellow firefighters try to get them out to safety.