I think the meteor refers to the Tunguska event, which was an explosion (mythical I think) of a meteor 3-6 miles above Krasnoyarsk Krai of Russia (Video says so anyway). Apparently it was 1,000 times as powerful as the Hiroshima bomb. Some people believe that the meteor explosion caused a zombie outbreak.
what??? You mean in real life people thought it caused a zombie outbreak?? that's just messed up!