Continuity mistake: When Bruce goes to gear up to rescue the Ice Princess, there are visible footprints on the drawbridge that leads into the chamber where all the bat suits are kept. When he then steps back out in his Batman attire, the drawbridge is now clean of all prints. (00:00:24)
Continuity mistake: In the shot of Mr. and Mrs. Cobblepot by the window, they both hold a martini. Mr. Cobblepot's martini glass is full to the top. But after the baby pulls the cat into his crib, Mr. C's martini glass is suddenly only a quarter full. (00:00:50)
Continuity mistake: When Oswald Cobblepot is in his crib as a baby, in outside shots the rubber duck on the string is swaying back and forth. In shots through the crib bars, it is dead still. (00:01:00)
Continuity mistake: When the Cobblepots throw the pram into the lake, in a wide shot the water surrounding it is rippling and there isn't much snow on the water. In the closeup the water is still and the lake is covered in snowflakes. (00:02:05)
Continuity mistake: When the Penguin is looking out of the barred sewer hole, from an inside shot we see the penguin holding two bars, and in between the bars he is holding are two bars. In the next shot, there are four bars in between. (00:06:05)
Continuity mistake: When Alfred is walking along with his red gift bag, there is a present at the top of the bag which changes position between shots. (00:06:20)
Continuity mistake: When Alfred is walking off of the pavement, and across the grate, we see the penguins hands sticking out of the sewer bars. Then it shows another shot of Alfred looking at the bars, only the snow around and under the bars has changed. (00:06:40)
Continuity mistake: When the camera pans up to show the Schrek headquaters, in the first shot a warm blue light is coming from the windows, and no pillar lights are on. In an overhead shot bright light is on, and emitted. (00:07:00)
Continuity mistake: When Selina is pouring Max his coffee, the kettle spout changes position. (00:07:20)
Continuity mistake: After Selina pours Max Schrek his coffee in the first boardroom meeting, she walks around his chair twice. (00:07:30)
Continuity mistake: After Max Schrek throws some of the presents out to the crowd, when it cuts back, between shots a large green present on the top of the pile vanishes. (00:09:55)
Continuity mistake: Batman's large fish tank (which opens the sphinx statue) is not there in the shot where Bruce is sitting in his chair and the Batman symbol is then shone on his bookcase. (00:12:45)
Continuity mistake: At Wayne Manor, Bruce receives the projected bat signal while in his study. As he stands up, the circle of light hits only the last shelf on the bookshelf behind Bruce. But in the next shot, the light circle is much lower and hits almost the entire bookshelf. (00:13:10)
Continuity mistake: When the joker henchman busts the door and lifts up a flaming stick to blow at a pile of teddys, the angle in which he holds the stick differs through consecutive shots. (00:13:40)
Continuity mistake: The length of the bar which comes out of the side of the batmobile, which subsequently knocks over the clown twirling the batons, changes between shots. (00:13:50)
Continuity mistake: When Batman is nearing the two clowns juggling flames, the clowns drop their flaming batons twice between shots. (00:13:55)
Continuity mistake: The piece of wall that Batman yanks out of the wall with his gadget is clearly in a much different shape after it has been taken out. (00:15:20)
Continuity mistake: The rubble and debris from the piece of wall which Batman tore from the wall, which lies beside the clown, differs between shots, and so does the clowns position. (00:15:50)
Continuity mistake: When Selina retrieves her papers from the floor, she places them in a disorderly pile beside the clown. In the shot when she zaps the clown with the taser, the papers have changed position and are stacked neatly. (00:15:55)
Continuity mistake: When the Penguin is first talking to Max, about him helping him emerge from the sewers, he spits as he speaks, and black spit covers his chin. The spit disappears when he begins to show Max the toxic waste, then reappears and vanishes again. (00:20:00)
Answer: It isn't. If you look at when he dies you will see that he has cuts on his face that are bleeding red. The blue liquid is more like a bile, probably similar to saliva.