Originally Posted by V_RocKs

The electrocution does not KILL the pig. It just stuns the pig. Like One Flew Over the Cookoo's Nest.

The pig must be kept alive because they are counting on its heart to pump out the blood. That is why the blood flows out like a bag of beans... The heart is pumping it out. The pig feels that knife go in... It just doesn't react because it is stunned and in shock.

As for the guy talking about the farmer killing the pig. Are you sure it wasn't just nerves? Most head shots result in body twitching that lasts for a few minutes to as long as ten.