And the tournaments for a dozen different sports were ruined that year. 

The Double Finger sports riots are considered the largest single human preventable loss of life in the Current Era. 

Some people say it's a radical outlier and shouldn't be counted. 

But the dead don't care. Dead is dead. They get shouted down.

Others say that when you look at certain categories together they're more lethal. 

It's a better argument. But no one agrees on what categories go together naturally. "Illness" or whatever is a bunch of disparate things. 

So officially, legally, and on the record: The most dangerous routine activity is, actually, sports fandom in general and sports hooliganism specifically. 

Sports- physical sports- is one of those things that uses a lot of specialized equipment and vehicles. 

Nerds on Ailor will know this. Geeks on Ailor will let you know that Truck-kun is a -5 Current Era Three Diamond Fusion Fighter with the white trim and intercooled turbo.

There are, surprisingly, a decent number of these still around. Keeping around old stuff to maintain and modify and tinker with is the largest drag on the Ailori economy. 

And if you feel like removing the legally required speed limiter it can get up to some pretty dangerous speeds.

Which someone might do if they were planning on starting a sports riot and then stealing one as a getaway vehicle. 

So that's why it became a common trope in fiction despite almost never happening in real life. 

...almost never is not, in fact, never though. Heads up!

Wait, what!?

*BAM*