Centaurs are real and they do wreak chaos and destruction on Earth from time to time. We must wake up and realize that it could happen any time.
The theory says that the leonid meteor showers are part of a large broken comet (Centaur). At one time in the future instead of lovely shutting stars spectacle we will be bombarded by several large objects which will destroy our civilization completely. Last year on 31 Oct (Halloween) approximately 400m big dead comet flow past Earth at 124km/s. The NASA showed us the picture - it looked like a scull. Evil omen. Perhaps.
If it hit us the destruction would have been enormous. The Tunguska event meteorite (probably also part of that comet) was about 200m.
How not to be melancholic?