I'm just starting the process of enlisting in the Army. Going for 11B w/ Airborne ('cause who needs knees?), but it's too early to say for sure. Currently though, I occasionally get to contract work with my step-dad at a company that builds pump skids. I honestly couldn't tell you how they work, I just do the basic work: spray painting, connecting pipes, sorting parts, heavy lifting, moving stuff with the crane, etc. The works fun, but it's in a metal warehouse in SE Texas with no AC, meaning it's often upwards of 100 degrees (highest internal temp I've seen was 112). It's great work though, makes me feel like I'm actually earning the money and not just being given it because I legally have to be. And I've only thrown out my back once.