Story is from Canada, where an 18-year-old man was fatally stabbed, then beheaded by his seatmate, a stranger with a large, Rambo-style knife, passengers said.
"I screamed 'stop the bus!' ... Everybody got the hell off, and people at the front of the bus didn't really understand what was going on. It almost turned into a trample scene there, everybody trying to get off the bus. But the guy didn't care at all. He wasn't concerned with anybody but the guy he was stabbing.
"The guy was totally calm. When he brought the head he looked at us and dropped it. It was like he was having a day at the beach. He couldn't be bothered by anything else."
Hat Tip: Many thanks, Ash and Shanski!