Continuity mistake: When Phil is telling Hercules about rules number 95 and 96, the nearby tree changes shape.
Continuity mistake: When Hercules rips off the door, Phil is holding onto the right side of the handle. In the next shot, he is holding onto the left side of the handle.
Continuity mistake: At the start of Phil's song, he is standing on a pillar. The angle of this pillar varies between shots.
Continuity mistake: When Hercules is talking to Meg about "that Oedipus thing," between shots he and Meg move closer to the end of the stairs.
Continuity mistake: When Meg walks after the centaur fight, Hercules says "She's something". Between shots his shadow changes.
Continuity mistake: The rope in the wagon magically appears after Hercules falls into it.
Continuity mistake: Between shots of Zeus saying "I swear Hades, when I get out of here," the mountain of molten lave he is trapped in rises further up his body.
Continuity mistake: After Meg's death the nearby rocks and objects change between shots.
Continuity mistake: In the beginning, only four titans are imprisoned underground. Later, as Hades sets them free, the arms of five different titans burst out of the ground.
Continuity mistake: When the gods are celebrating the birth of Hercules, the thunderbolts in Zeus' pocket disappear and reappear.
Continuity mistake: When Pain and Panic are shown for the first time, the cracks on the ground change between shots.
Continuity mistake: Hercules is on the highbar in the stadium. In one shot, the "rings" appear near him. Not only are the rings just hanging from nowhere, they disappear in the following shot.
Continuity mistake: Herc is fighting the Cyclops. He has two black eyes & a bruise on his left arm. Phil shows up & starts to wipe Herc's face. Suddenly, a bruise appears on Herc's right arm too. After Herc says, "Dreams are for Rookies", this bruise disappears.
Continuity mistake: Herc is riding the big Centaur like he's in a rodeo. In one shot, his headband has suddenly appeared in his hand. The next time he's seen, the band is back on his head.
Continuity mistake: Phil grabs the door & the hinges are on one side, while the handle is on the other. As he turns the door around, the hinges & handle have jumped to the other sides of the door.
Continuity mistake: Panic flies up in the air & lands with his horns stuck in Pain's butt. When he lands, he has a horn in each cheek. Then Pain stands up & turns sideways, showing Panic with both horns in only one of Pain's cheeks.
Continuity mistake: One of Herc's shoulder clasps come undone during the Cyclop's fight. After the Cyclops drops him into the cart, the clasp is done up again.
Continuity mistake: Hercules has his ribbon around his neck in the temple. As he's praying, a wind suddenly blows up. The ribbon around his neck is gone when this happens.
Continuity mistake: In the scene where young Hercules is pulling the cart of hay, his's adopted father and the donkey are riding on the seat and both are holding onto the sides of the seat since they're going so fast. Once they stop, Hercules's adapted father mentions the donkey's hurt foot, and she's now got a sling on the left front leg which wasn't there during the wild ride.
Continuity mistake: In the scene where Hercules is hiding behind a curtain from all the ladies Meg pulls down the curtain and Hercules only has one gold band.In the next shot Hercules has two gold bands.
Answer: I always assumed one of the gods told him how to get there after they won the battle. The underworld in Greek mythology could be traveled to by mortals, albeit extremely ill-advised.
Jordan Oxendine