My friend is having a pig roast & buying it live. How would he transport & destroy the pig? Why buy it live?

LOL, what you need is a video camera so that you can tape your friend stuffing this 200 lbs hog into his SUV and the Malay that will result. Maybe you're friend just likes to get down and dirty with his food? Smashing it's brains out with a sledge hammer isn't really going to work.