Riots

From UA2ndEd:

Treat riot roll (result of 51+) as HTH damage every 15 minutes for the first hour of exposure, until the riot spreads out (Along with the property damage). If you’re perceived as being the cause of the riot, the riot roll does firearms damage to you every 10 minutes for the first hour of exposure (basically, you die unless you get out of sight/under cover). 25% of participants in a riot become casualties. Dodge checks work normally if that’s all you do for the riot. Riots last longer based on the size of the mob- GM fiat, though there are crunchy rules based on the result of the riot roll.

Every hour of rioting inflicts 1 rank-4 helplessness & violence check, plus any extra violence, helplessness, unnatural, or self checks that may apply from your own behavior, or the behavior of others towards you.

Property Damage: multiply riot roll by $100k. For every million in property damage, torch one building.

Have fun!

I would like to add one thing:
Riots vary in method from country to country and depending on whose rioting. I mean the rules are made for everyday strollers, commuters and such going crazy when they see a guy do magic but depending on where you are and what kind of witnesses you have the effects may vary.
For example:
The CPE riots in France last year (2006) where huge, people where really pissed off and EVERYONE was in on it. (seriously I met up with this 60+ yo woman who where there with her grandchildren during the fighting at Place de Republique)
They on the other hand didnt do much damage on buildings and such (it was about 5-20 000 people rioting so… just imagine that in numbers) and they where VERY disorganised.
Where as in Sweden when the riots go of its not that many peoople rioting but they sure can fuck up a building or four and they are extremely organised (moving in groups with a form of commander, using tactics and formation to fight police)

The point is that riots are big, chaotic and not so structuralised as one might want (since we are playing roleplaying games that simulate reality).
In riot scenes with my group I just go nuts and start throwing details at them to make them panic and forcing them to react without thought and then depending on their actions just roll for attacks…

Also remember that even though riots may look like they are kinda slapdash more often then not they DO have a form of reasoning and even though a proverb whose source and proof is never questioned disagree with me I would like to say that a crowd not only might be, but is very often, kinda clever instead of just dumb and panicky.
When the reason for fear or anger is removed the crowd usually goes kinda docile and either start looting, leaving or if they are kinda organised building barricades and setting up for another attack from whatever it was that scared them or made them angry.

rekyl.