The latest patch for Assassin's Creed IV on PC added support for some fancy PhysX particle effects, which includes smoke. Lots of smoke.
In fact, enough smoke to prevent you from telling what the hell is going on -- which can be something you might actually like, sure. Chaos can be fun. But still, my guess is when you're dangerously close to desynchronization, you'd be more interested in countering blows instead of staring at fancy smoke.
The smoke is quite fancy though, I'll give 'em that. Take a look for yourself:
Questions? Comments? Contact the author of this post at andras-AT-kotaku-DOT-com.