I plugged the power cord into the SE the whole way, completely fine. It would not turn on. I wiggled it. It made electrical sparky noises, and I flipped the power switch on again. It turned on then turned off then turned off then turned on. I wiggled it some more, and it stayed on. Confused as to why it would only turn on if the power cord was at a certain angle, I wiggled it some more to see if I could determine the angle. It seemed to be random. I wiggled it even more, and it tripped the breaker.

What happened?