Oh, no! Your best friend has been entranced by Pazuzu! Bummer! No need to call any specialists, though; just pull up your sleeves and you can deal with this yourself. In many works of fiction, the best way to free a possessed or cursed person is to simply beat the crap out of them. You won't need to worry about hurting your friend, either; it's just the curse / demon you're punching, not them. Once you punch them into unconciousness, they should wake up perfectly fine (albeit probably with a massive headache). Examples of Beat the Curse Out of Him include: