The Mortal Instruments: City of Bones (2013)

Revealing mistake: When Jace and Clary are on the spiral staircase in the conservatory, the automatic overhead sprinklers go off. Even though the (CGI) water spray can be seen falling all around them and they are not under any cover, they are obviously not getting wet, their hair and clothes staying perfectly dry. When the scene cuts to a different viewpoint, there are some water spots on Jace's back, but they are in an odd pattern and only in a small area, not all over his light-colored shirt, which is dry. As they are walking back to Clary's room, both are still completely dry and the wet spot on Jace's back has disappeared.

raywest

Hodge Starkweather: Everything you've heard... About monsters, about nightmares, legends whispered around campfires. All the stories are true.