Fuck, man. It's really sad news. I've always enjoyed the F&F movies, and in some weird way respected them for balancing the stupid ridiculousness with actually good entertainment onscreen.
I mean, the fondness Jeff and Ryan would speak about the F&F movies is how I feel about them. And Walker has been a big part of those films.
I thought he was legitimately great in 'Running Scared', too. Thought that was a pretty good movie.