Continuity mistake: In Sarah's fathers bedroom, the green chair that sits by the back doors changes position during the scenes, and the cushion and soft toy that sit on it often change their position as well. (00:08:05)
Continuity mistake: When Sarah runs to the side of the 'bubble' and smashes the glass with a chair, you can see that the table and the chair that she uses aren't reflected in the glass as she runs up to it. (01:06:30)
Audio problem: In his throne room, Jareth starts to sing, "Dance, magic, dance..." In the overhead shot when they sing the words, "Put that magic spell on me," he kicks the little guy up, then in the next front shot when he sings the second line, "Jump, magic, jump," and just before and during which he throws Toby in the air, in all these shots either his lips do not reflect the words heard or his lips move and no sound is heard. (00:23:55)
Continuity mistake: When Sarah is at the park reciting the Labyrinth play, she has stud earrings in each ear. When she arrives home and then argues with her mum, they have gone. (00:03:10 - 00:05:25)
Visible crew/equipment: After Sarah calls out "Toby!" in the Escher stair room, she jumps off the ledge. She then drops downward and lands amongst a variety of stone objects that drift all around her. The lines that the stone objects hang from are seen. (01:30:30)
Continuity mistake: Sarah goes to pick up the fairy that dropped right by the wall. But in the next shot, you see Sarah stand up with the fairy in her hands, and she is now standing quite a way from the wall. (00:14:55)
Continuity mistake: When Sarah first enters the labyrinth, and is running down the passage, the branches, bits of log and wood etc., change, disappear and reappear between different angled shots as she runs. (00:17:45)
Continuity mistake: When Jareth throws the snake at Sarah, from a back shot the snake goes over her shoulders and crosses over by her neck, but in the next front shot the snake is only in front of Sarah and isn't over her shoulders anymore. (00:13:00)
Continuity mistake: When Sarah leaves Toby's room, just after saying the Goblin wish, you can see two paintings hanging beside Sarah's bedroom door. They have a wooden frame, but when the shot changes, and Sarah walks towards her bedroom door, the paintings have changed, and the frame of the painting is now metal. Then when Sarah enters Toby's room again the paintings have changed back to the wooden framed ones.The bottom picture itself also changes.In the 1st shot there seems to be a bouqet of flowers but when Sarah is outside of the room the picture is of a long bare landscape. (00:09:35 - 00:10:20)
Revealing mistake: When Sarah is trying to reach Toby while in the Escher-style room, there is a scene where Jareth is walking along (underneath where Sarah is standing), he does an 180-degree flip around the edge of the platform. If you look at Jareth's shadow, you can clearly see the shadow of a support bar pushing him up. (01:24:45)
Revealing mistake: When Sarah attempts to cross the bridge and winds up holding onto a tree branch, Hoggle gasps, revealing the actor's face inside his mouth.
Visible crew/equipment: At the Bog of Eternal Stench Ludo summons the rocks with his howling, and we then see one shot of a rock rolling forward. You can see a thick wire attached the centre of the rock, pulling it forward to make it roll. (00:58:40)
Continuity mistake: When Sarah, Hoggle, Ludo and Sir Didymus enter the center of the Goblin City, a cannonball is fired at them, but it misses and it hits a clean portion of one house's white wall. However in a previous shot, the same portion of wall was covered in a black grubby substance. (01:16:40)
Continuity mistake: At the gates to the Goblin City, when Hoggle jumps from the metallic robot, Sarah runs to his aid. In that overhead wide shot and in the following shots, her hair changes as she speaks with Hoggle. (01:17:55)
Continuity mistake: When Sarah walks towards Toby's cot before pulling back the sheets, just before approaching it, there is a shot of the cot. Then in the next shot it shows Sarah reach down then pull back the covers. Between the two shots the covers and pillow have moved and changed their position. (00:10:45)
Continuity mistake: When Sarah leaves her room, because she realises Toby has her teddy she leaves and swings her door open. But when she leaves Toby's room, her bedroom door is shut, and her parents couldn't shut it as they're out. (00:06:40 - 00:09:55)
Continuity mistake: In the park, Sarah looks up when she hears thunder and in the front shot the headpiece ribbons are in front of her left shoulder. In the next back shot both sides are behind her shoulders, yet in the following front shot the left ones are in front again. (00:03:35)
Continuity mistake: Sarah picks up the rocks that have rolled towards her, in order to save Ludo. The leaves in the corner area that the rocks are in are arranged differently in the close-ups and wide shots. (00:42:00)
Continuity mistake: When Sarah, Ludo and Hoggle wait for guards to run by, she says, "Be careful. Okay," and the houses around them are visible. Later, when the six Goblins are blasted up in the air, they are in the same area, but this time there are two large planks of wood mounted on the home's stone wall to their right, under the small semi-circular window. (01:21:00 - 01:24:30)
Continuity mistake: When Sarah reaches Jareth's throne room, before she says, "Oh no," there is a wide shot of the room. When she says, "That's the only way he ..." things in the room have changed position. (01:26:40)
Answer: To add to that, the other door was supposed to lead her to certain death, and technically the oubliette wasn't exactly certain death.