Continuity mistake: When Cedric puts his name into the Goblet, you can see that his hair is wet on his fringe and stuck to his forehead in several clumps of hair. After he has stepped away from the Goblet, his hair has changed position. The clumps of hair are in different places and a gap has appeared. (00:28:00)Ssiscool
Continuity mistake: During the first challenge, the arena/stadium is significantly smaller during the bird's eye view CGI scenes than the physical scene's interior shots.