Silly Goof.
What I found quite silly was the "gold". Not only did it look nothing like gold, there was another serious problem with it.
Its weight, or rather, lack thereof. Gold weighs more than 20 times what water weighs. So while it would be quite hard for a single man to lift such a coffin filled with water, lifting a coffin with gold is quite impossible.
Even more impossible than a single man dragging a coffin filled with a machine gun and ammo through muddy streets...
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