Those metal bits look big enough to kill a person. I mean, anything havier than a marble falling from high enough will do a lot of damage, right?
In SF, it’s common for car thieves to break windows using a small chip (size of a pencil eraser) of ceramic from a spark plug. The ceramic is super hard but light weight and can shatter a window easily.[1] being hit by it would barely register.
That said anything-metal falling from the sky is dangerous.