Just watching old footage of actual atomic tests in the 40's and 50's with the soldiers just standing around, not in a bunker, with the cloud towering above them seemingly not too far away, you could figure out that was bullshit. Actually surprised Kyle didn't show any of those after he shows his work.
When my dad was stationed at White Sands our neighbor in Alamogordo was a local who grew up in the area north of Tularosa. He saw Trinity go off as a teen working on his family's property.
He said he didn't see the initial blast, every thing just turned black and white and then a moment later he was knocked to the ground. Said he thought the world was ending, and he was making himself ready for the rapture.
He was really pissed when the government told everyone it was just a planned demolition of ammo. Saying even a stupid kid of a dirt farmer knew explosives didn't do that.
While the show is amazing, that's not good advice. For example that first blast was very survivable from where they were. Also there's a second shockwave that goes back the other way so don't get up too quickly. Go play around on nukemap, it's fun and educational!