Most of these asteroid impact models are also missing the secondary impact events from ejecta. For very small asteroids it's not much of a concern but anything

Most of these asteroid impact models are also missing the secondary impact events from ejecta. For very small asteroids it's not much of a concern but anything large enough to be dangerous would kick out enough material to create a storm of falling superheated boulders. Big enough asteroids can blast stuff into orbit which then falls all over the Earth.