What over-the-top stunt did two teenagers perform that turned a small sleepy town upside down?

When they decided to attempt a racing stunt down a mountain road in the middle of the night, these boys had no idea that they were about to initiate Black Thursday, as the police called it. Black Thursday would not end until several people were dead and many more maimed for life.

Can three separate fatal accidents over a period of 12 hours in this northern New Hampshire town of 300 residents be purely a horrible coincidence as the police ruled? As a surviving victim of Black Thursday himself, the author reopens the case and proves that the terrible events had a sinister connection...