Fear turned Catalysts

In many a story, there comes a time when the hero, heroine, or someone else is terrified of something or someone, which in turn sets a plot in motion. This usually involves the following circumstances: This can lead to prejudice, skepticism, or, ironically, the hero's friendship with another, in addition to getting to know them.
 * The hero/heroine is frightened of someone (or the other way around) and is unaware that the someone has good intentions
 * Someone can be terrified of the hero/heroine, usually out of surprise, shock, or unjust fear
 * Someone is frightened of the hero's powers, race, species and/or size

Noteworthy Examples

 * Winnie the Pooh and the gang are initially afraid of Kanga and Roo, thinking they invaded their neighborhood, but after Piglet's experience in her house, they realize how nice Kanga is.
 * When Mimiko introduces Papa Panda and Panny to the town cop, he runs out of the house in terror, which leads to the police hunting them down.
 * Kim Boggs notices Edward Scissorhands on her bed and becomes terrified, thinking a murderer broke into her room, but her mother assures her that everything is going to be okay. Later in the film, she grows a strong bond with Edward.
 * Mrs. Beakley notices Webby's baby elephant and runs over to Scrooge McDuck, which in turn leads him to question his nephews.
 * Mowgli is initially frightened of Baloo, unaware he saved him from Kaa.
 * Pacha becomes terrified when he first catches sight of Kuzco the llama after freeing him from the sack.
 * Larry's Amazing Animals are initially frightened of Clifford the Big Red Dog when he enters their tent, but our hero assures Shackleford he just wants their autograph and praises them for their act, which eventually leads to their friendship.
 * Maudie grows terrified and runs to King Fergus when she notices Queen Elinor as a bear, which leads to Fergus chasing her.
 * Donkey starts out being terrified of Fiona when he notices her as an ogress.
 * Sulley becomes frightened when he initially catches sight of Boo and tries to hide her in a duffel bag. Unfortunately, that leads to her entering Harryhausen's restaurant and causing panic, which in turn leads to the CDA hunting her down.
 * The scullery maid notices Merlin's dishwashing magic and warns Sir Ector, which leads to Wart getting in trouble.

Quotes
"(The town cop comes to Mimiko's house to check on her. He knocks on the door.) (Town Cop: Hello, Mimiko! Are you in there?) (Mimiko: Yes, come in. The door's unlocked.) (The cop opens the door and steps in, smiling. Mimiko opens the door to her room. She, Papa Panda, and Panny poke their heads out.) (Mimiko: Good morning.) (The cop yelps in surprise.) (Mimiko, to Papa Panda: Our guest is a very nice policeman from town.) (Town Cop, shuddering: What's that?) (Mimiko: Panny and my papa, of course.) (Town Cop, flabbergasted: Uh, papa?) (Mimiko, with a giggle: Uh-huh.) (Another door opens. Panny pokes his tiny head out. The town cop's surprise turns to shock) (Town Cop, with a yelp: A pa-pa-pa...!) (Papa Panda, revealing his giant face: Did you call? I'm the papa.) (The town cop turns to the smiling panda and as soon as he notices this, he lets out a scream that rattles the windowpanes and runs out the door.) (Town Cop: A PANDA!) (The terrified cop runs off into the woods.) (Mimiko, to Panny and Papa Panda: Wow, he wasn't nice at all. He was rude.)"

- Mimiko introducing the town cop to Papa Panda and Panny, which unfortunately terrifies him and leads to the police tracking them down. "BLAAAAAH! Don't eat me!"

- Piglet terrified of Kanga when he comes across her for the first time, unaware that she is kind. "Demon llama!"

- Pacha terrified of Kuzco the llama when he catches sight of him.