This one would only be funny to me since I'm a buff for the comedy duo.
Abbott and Costello Meet Harry Potter
[Both stand outside Hogwarts]
Lou: Oh now look what you have done! Making us board the wrong train... I'll go see where we are... you stay here and keep quiet.
Bud: But Lou! Its creepy around here...
Lou: Bah! Its all in your head! Now stay right here!
Bud: All right...
[Lou exits, Bud stands near the luggage, getting more scared as time passes]
Bud: Its all in my head... Its all in my head... [Walks toward the Whumping Willow (or whatever stupid name it was)]... my what a strange tree... [Willow pounds ground at his feet. Bud stares at the tree now moving] K..k.kk.kk.kk.Loo...Lou! LOU! [Runs off, holding cap]
Yep... I am the only one finding this funny. Perfect fanfic