Can someone explain the “heat wave”-like distortion that the camera briefly experiences well before the blast wave seems to reach the building. How could an atm

Can someone explain the “heat wave”-like distortion that the camera briefly experiences well before the blast wave seems to reach the building. How could an atmospheric effect make it to the camera at two different speeds? Not to be callous to the incredible tragedy at play, but I simply find this video to be mesmerizing in its quality and potency. In America we’re born and raised on countless explosions in pop culture whether it’s a Hollywood or gaming. They’re to the point of being so utterly mundane that it’s rare for Hollywood to wow an audience with a mere explosion anymore (though I could certainly name some memorable ones from over the years). We all now think we know what they look like in urban environments, and have for the last 30 years of high quality special effects. But. This video is real. And the details and nuances at play have simply never been depicted in film or tv before. To see the physics at play is simply mind boggling to me. I’d love to read a frame by frame account by a true expert of this 4K video.