Mr. Dood-
I went to change my spark plugs, & there were no spark plugs. The wires were just stuffed into the holes! (j/k)

Yes, you're actually looking at the bottom of the caliper piston.
What SpecR said is very, uh, "word-like": Get an impact driver ($8-10US). They're cool tools to have. It's a screwdriver that's made to absorb and convert into a screw-turning motion the impact when hit with a hammer. Perfect for those rotor screws. And when you re-install your fasteners, put some anti-seize compound so you'll be less likely to go thru that crap again.

-W-