Whether she's Hermione attending school at Hogwarts or her non-magical self on the set of Noah, Emma Watson has not had a good relationship with the woods.

While filming Darren Aronofsky's film adaptation of the biblical story in Long Island, NY, Watson "screamed in terror" when she ran into a man among the trees - a man whom she recognized from hanging around her home. The man tried to escape the set, but security managed to capture him and sent for the police, although he was let off with a warning for trespassing.

"It was really creepy. Emma was really shaken up and was given some time to compose herself," a source told The Sun.

According to the insider, the stalker run-in only adds to Watson's stress about filming the project: "The movie has been grueling anyway and this left a very sinister feeling hanging over the set."