Some states give the prisoner a choice between being fried, poisoned or shot.
I'd rather be surprised. If they ever do execute Timothy McVeigh, a lot of people who want to watch will be sitting behind a glass partition seeing him die in seconds. Humans have thought up hundreds of ways to put other humans to death over the years and executions have always been crowd-pleasers. Stoning was once common, with rocks. Crucifixion was another common method of execution.