Not sure exactly what prompted my interest in this topic tonight, but I recalled a Japanese simulation I saw online a while back in which an enormous interstellar object (like an asteroid or comet) was shown to have impacted the earth. I was able to find various renditions on YouTube and am posting the one I felt had a good accompaniment.

Incidentally, it turns out there is a known asteroid that has the potential of impacting the earth (somewhere near the year 2800 AD).

• Averting Asteroid Armageddon
• NASA/JPL on 1950 DA
• Wikipedia on 1950 DA