Corpses don't stay fresh very long. In reality, you've got a window of about 24 hours before they smell worse than anything you can even imagine. Parade them around in the sun, and that time goes down to maybe four hours. This was the problem faced by the fine people who brought you Weekend at Bernie's II. They partially solved it by bringing Bernie partially back to life through a voodoo ceremony, but the movie still makes the original Weekend at Bernie's seem like Citizen Kane.