Supernatural2005

Sam Winchester:
[They are about to drink the tea made of African Dream Root] Wait, wait! Wait. Can't forget this. [He removes a small envelope from his pocket, removes something from it] Here. [He puts some in Dean's hand]

Dean Winchester:
What the hell is that?

Sam Winchester:
Bobby's hair.

Dean Winchester:
We have to drink Bobby's hair?

Sam Winchester:
[He puts some in his own drink] That's how you control whose dream you're entering. You gotta... drink some of their, uh... [He swallows in distaste] some of their body.

Dean Winchester:
[Stares at his hand, then shrugs] Well. Guess the hair of the dog is better than other parts of the body.