I found the problem with the funky servo. I disassembled it and found a broken wire. The wire is for the limit switch and with it broken, the servo wants act like a motor and just spin. The throttle was just some dumb a__ (i.e. me) bumping the throttle lever. Does anyone know where I can buy just one servo? Everywhere I've looked online sells only sets of four. I'm going to patch it together and try not to crash it again.