Probably inaccurate, but what ever.
This would last 0-3 seconds and would be somewhat painless. Within this range, there would also be a wind from the shockwave that would exceed more than 700MPH, and would likely destroy everything within 15-30 miles from ground zero and break windows +1,000 miles away. But, I'm an expert on stuff that can kill you for some reason.
From with in 66 miles of the airburst detonation of 11,204 feet from the ground, you would get 3rd degree burns. Within the first 30 miles of this zone, the burns would go within multiple layers of skin, destroying the nerves instantly.
its acrually ok but it will be better if there is abetter exlosion
2+ 5- 100+ X 23+ 3- 1,000+ * * * *
Tsar bomba was a thermonuclear bomb, not a nuclear bomb!