I actually work part-time as a firefighter. You'd think that this is more of a career thing rather than a second job, but it is very rewarding and I actually make ok money at it sometimes. In fact, the Captain of my Company is also a pilot; he flies a G4, and another former firefighter from my dept. is now working in CA flying helicopters. I guess that this job draws a lot of the same personality types...like the kind of people that cannot be tied down to a typical desk job, a common pilot trait. Downside: there is a bit of a training involved which can take some time, but myself and other pilots have made it work. I feel I have the two best jobs in the world.