Wow! Too many suppositions to read through them all!
Here are the facts.
AC is more dangerous. DC is continuous, and tenses muscles. AC alternates at a frequency (I'm assuming 60Hz) that is close to your heart rate. AC, when it causes fibrillation, does so because it interferes with, and destabilizes, the signals that tell your heart how often to beat. DC almost never causes fibrillation, so death by DC almost always involves either long-term exposure, preventing normal heart/lung operation, or tissue damage.