Near the end of the film, Hercules swims away from the island to a boat, but when he climbs aboard he is completely dry.
When they drop the underling into the pit of liquid he is face down, but his skeleton is face up.
Soon after Hercules lands on the island of captive women, he fights several animals, including a vulture. Wires controlling the vulture are visible during the fight.
In the opening scene when the men are fighting in the tavern, Hercules pushes a group of men backwards, and the man on the left in the front has a "costume malfunction" involving his member.