"My guess is that some alien, cheeky and terrible teenagers left home with their parents' UFO".
Their parents' Unidentified Flying Object? How did they get on board if it was already flying? How did they know it was their parents' if they couldn't identify it?
It's not direct brain-control, i.e. reading brain signals. Myoelectric control measures the electrical activity of muscles, which are in turn controlled by your brain.