Electronics questions

[baker3]

Ok oztruck, so I tested the servo on a RC crawler ESC I have laying around and wired the servo motor directly to the ESC. I was able to get it to continuously rotate but when I put it into reverse, one of the little flat black boxes heated up and glowed orange on the servo controller. Here is yet another question. The ESC I have runs 2 motors. Is there a way to know whether the ESC will be able to operate the servos independently or will I have to buy a certain type of ESC? I only have a gun style controller to test on now until my turnigy gets here.