In the last scene when blood is coming out of his mouth. First it comes from the corner. In the next shot another streak of blood comes out near the same corner but the previous streak of blood is closer to the middle of his lip.
When Taylor is washing his hands the blood of his forehead changes between shots.
In the shot immediately before the opening title card, there is a shot of Jenny's lifeless body. In this shot, she has a clean face and the ground surrounding her is also clean. However, in the shot immediately after the opening title card, there is suddenly blood down the left (screen-right) side of her face and a large pool of blood around her head.