[Physicist]

Even if there is a 100ft space rock that close the odds of a hit are pretty big and even if it enters the atmosphere alot of it would burn up and what's left only has a 25% chance of hitting the ground.

That doesn't make it safe. The Tunguska bolide burned up completely before hitting the ground, yet it devastated a very wide area.

[cogitator]

The Tunguska bolide burned up completely

Wouldn't "exploded" be a better description of what happened, considering the 'Ground Zero' upright trees and the knockdown pattern?