There's not much to say about acting but this. Never settle back on your heels. Never relax. If you relax, the audience relaxes. And always mean everything you say.
New Orleans is 5 feet below sea level, which means that holes dug in the ground immediately fill with water. Coffins were punctured and sunk with weights, which didn't stop them from floating up out of the cemeteries and down the streets of the French Quarter on stormy nights. The solution was to bury people above ground, in what are called vaults.