Missed the Kosmogonia Launch Event? The full recording is right here. Click the link: https://www.youtube.com/watch?v=HBSIg5a7PGM&t=4s
He walks through a scenario most people never consider: what if a comet nucleus isn't traveling alone? Halley's comet has a nucleus about 10 miles across, but larger comets exist, some theorized to be 20 or 30 miles in diameter. The real variable isn't just size. It's the possibility that the nucleus is surrounded by a swarm of debris that has spalled off over multiple passes around the sun. If that comet makes a close pass to Earth, you might see the main nucleus in the sky while fragments from its entourage are already impacting the surface. The consequences wouldn't come from the comet itself, but from the debris field traveling with it.