Favorite Son - S1-E6
Continuity mistake: When Lucifer is about to leave Linda's office she stops him and raises her hand in front of her chest. When the shot changes, her hands are not visible even though they should be. (00:17:40)
Favorite Son - S1-E6
Continuity mistake: When Dan confronts Mazikeen over leaving him in Chloe's apartment, he has his arms outstretched in the front shot and down by his side in the reverse shot. (00:21:20)
Favorite Son - S1-E6
Continuity mistake: Near the end, as Lucifer is bearing down on the biker asking who took his wings, the Biker stumbles and has both hands behind him. When the shot changes his left hand is raised. (00:33:40)
Favorite Son - S1-E6
Continuity mistake: The way Trixie grabs the chocolate cake differs from raising her hand up to Dan and just holding it out in another shot. (00:37:20)
Favorite Son - S1-E6
Continuity mistake: When Dan hands Trixie the chocolate cake, he holds it with 1 hand then two depending on the camera angles. (00:37:20)
Continuity mistake: When Malcolm lifts his jacket to show he is unarmed his jacket position changes between the two shots. In the first shot his jacket is hanging low and in the second it's held high. (00:19:40)
Continuity mistake: When Lucifer hands Linda the leaflet in the carpark, the way he holds it changes between angles. In one shot he's holding the sides and in the next he's holding the top. (00:25:40)
A Priest Walks Into a Bar - S1-E9
Continuity mistake: When talking to the priest in Lux, Lucifer's hands are constantly changing positions between cuts. (00:24:20)
A Priest Walks Into a Bar - S1-E9
Continuity mistake: When Lucifer goes to speak to the priest on the balcony after finding out about Connor Lucifer has his right arm by his side as he walks out. When the shot changes to outside his right arm is bent at the elbow and in front of him. (00:28:30)
A Priest Walks Into a Bar - S1-E9
Continuity mistake: The position of the priest after he has died changes between when Lucifer walks over to the other person and when Connor walks over to the priest. (00:35:00)
A Priest Walks Into a Bar - S1-E9
Continuity mistake: At the end on the balcony Lucifer's cigarette switches hands between some instant cuts. (00:36:30)
Answer: It's Lucifer's blood from when his wings got hit by the bullets. As Lucifer spreads his wings, they're white, and before he wraps them around Chloe, you see a bullet hit his wing above his right shoulder, and the spot turns red. After that, he continues to get shot in the wings before fleeing.
Bishop73
Agreed. His wings take damage and "bleed" similar to how he bleeds when Decker is around.
Ssiscool ★
If they were normal bird's wings, the lower part where there are just feathers should neither bleed like that nor be able to stop bullets, but they are angel's wings, so they behave differently.