Can we vote on his method of execution? Throwing him off a building is tempting, but too quick. Stoning him would give more people the opportunity for pay-back. Lottery tickets could be sold for positions. On the other hand, there’s a lot to be said for beheading...after everything else has been cut off.
I like throwing him into a pit loaded with hungry wild pigs.
Instead of throwing him off a twenty story building, perhaps they could throw him off a two-story building ten times times.
Bury him up to his shoulders in a pigpen. Throw a sufficient number of stones at him to bloody him, but not kill him or render him unconscious.
Then turn the boars loose on him.
slow roasted in a cage hanging above a fire
I would rule out anything that’s swift or merciful.