I aways love doing the math on these things.

An asteroid 50 meters across has some small risk of hitting the Earth. The closest it will ever approach is 1.8 million kilometers.

That's the equivalent of a 2.5 cm bullet passing you at a distance of 900 kilometers.

So that's like you're standing in Times Square in New York, and the closest the bullet ever gets to you is just south of Raleigh, North Carolina.