Continuity mistake: In the X-ray room when Constantine has lowered his cigarette he is standing next to Les and walks away. Their conversation goes on for a couple of shots and then suddenly he is standing right next to Les again and walks away. (00:14:15)
Continuity mistake: At the end (after the credits), when Constantine place the lighter on Chas' grave, Constantine's fingers on the lighter change position in the close-up view. (01:54:50)
Continuity mistake: When Angela is standing in front of the elevator and Constantine asks her what's wrong his hand is not on her shoulder. When it cuts his hand is on her shoulder right before she gets dragged through the wall. (01:14:45)
Continuity mistake: When Angela walks out of the confession box she grabs her necklace cross and holds it. When it cuts from behind her, both her hands are down. (00:11:15)
Continuity mistake: In the beginning when the Mexican's foot goes through the planks under the sand, a lot of dust comes up. When it cuts from within the hole we can see through it and the amount of dust has decreased. (00:01:00)
Continuity mistake: When the demon manages to break through the mirror it's stuck in, its hand comes through the mirror. When it cuts its hand is nowhere in sight. (00:08:10)
Continuity mistake: When Constantine knocks out the bouncer at Midnite's the bouncer's arms change position between shots. (01:15:25)
Continuity mistake: When Constantine and Chas are heading for Midnite's the first time and Constantine says "You're reading too much, kid. It's a bar", you see Constantine walking with his hands down. When it cuts, he's holding his cigarette to his mouth. (00:28:05)
Continuity mistake: When the Mexican walks away his friends talks to him while crouching. When it cuts we see his friend in the background but now he is on his knees. (00:01:50)
Continuity mistake: When the Mexican wraps up the Spear of Destiny he places the Nazi flag with the swastika pointing up. A couple of shots later when the Mexican turns around, the flag is folded in a different way and the Swastika is not visible. (00:01:35)
Continuity mistake: When Constantine approaches the apartments where the possessed girl is, he meets a woman holding a man while walking in front of him. When it cuts the woman is still holding the man, but now she is behind him. (00:04:20)
Continuity mistake: When the possessed girl talks to Constantine she has a big lump of hair on her forehead. When it cuts there is no trace of hair on her forehead. (00:05:25)
Continuity mistake: When the Mexican is reaching down the hole for The Spear of Destiny we can see him turning his head to the side. When it cuts he is looking down the hole. Also when he reach his hand down his arm goes between a broken plank and the edge of the hole. When it cuts his arm has moved over the broken plank. (00:01:15)
Continuity mistake: When the demon climbs out of the possessed and gets stuck in the mirror we see the reflection of the girl in the mirror and she is smiling with her eyes closed. When it cuts to a close-up of her she is smiling with her eyes open. It cuts again and we see in the mirror she is smiling with her eyes shut. (00:07:50)
Continuity mistake: Near the end when Constantine is on the floor with Gabriel on top of him. There is a shot from the side rotated by 90 degrees so they appear to be upright. There are several things on both Gabriel wrists which look like hospital ID tags. One of them on her left side has slipped down her wrist on to her hand. The shot switches to looking over Gabriel's shoulder and the tag is now back on her wrist and the writing has rotated. Switch back to a side shot and it's back to the original position. (01:35:50)
Continuity mistake: Near the end, after he slits his wrists, Constantine grabs a cigarette from his pack and places it on his left side. Later, when Lucifer is done with Gabriel and walks back to Constantine his pack of cigarettes is suddenly on his right side and far away from the puddle of blood. When Lucifer wants to grab Constantine's hand the pack of cigarettes is still on his right side but closer and almost in the puddle of blood. And finally, when Lucifer is dragging Constantine away the pack of cigarettes is gone. (01:40:50 - 01:42:20)
Chosen answer: According to the legend of "The Spear", it is indestructible.
Nick Bylsma