To start with, just remember to stay safe when you're using equipment like that. If you need a 5 minute break, take it, because mindlessly operating without paying attention can lead to bad, bad things.
Now...
I don't want to sound like an a-hole, but... man up. Working a deli counter and the pizza ovens isn't too bad of a gig, especially after school and on the weekends. I imagine you're probably working like 2, maybe 3 days a week? Well heck, that's about $130 a week. I'd imagine that's cash-money as well, right? Not bad.
As far as turning in the boss - why would you want to? He's giving you work, at a wage that doesn't suck, you're learning some skills that might be useful to you later on. Especially if you're working with cash and what not.
The alternative? I hear the library is just dying to hire someone to mop the floor for 8 hours a week. Now that's a transferrable job skill.
You're a dude, dude. Electric food slicers and mega-hot pizza ovens are in the "cool stuff" column, not the "OMG I'M TELLING!" column. That's the kind of job kids your age should want - not some crap supermarket job, walking around with a price gun, stocking cases of oatmeal. What the heck is cool about oatmeal?
Learn to enjoy what you do, have some fun with it - maybe your boss will even start to treat you better if he thinks you're into what you're doing.
Sincerely, the old man down the street... now GET OFF MY LAWN!