I'm no mechanic, but my neighbor is. I'm getting a BA in comp engineering by the end of this year. Naturally, I have a love of learning how things work. He's often working on something in his garage or in the driveway; I'd love to go "hover" to learn about what he's working on but I feel like I'd be bothering him or getting in his way. Several years ago, he changed out my brake pads and let me watch (even gave me some pointers on what to do). I've been changing my own pads ever since.