Remember Quenting Tarantino and Robert Rodriguez's double feature "Grindhouse"?
Between the two horror-homage/parodies there were fake movie trailers, one of them for "Thanksgiving," directed by real director Eli Roth ("Hostel")
Here is the EXTREMELY RATED R trailer for the parody.
(You don't have to hit "play," but I know you will, so enjoy it. Just make sure you're not eating).
Rodriguez also did a very funny fake trailer for "Machete" which will actually become a movie in a year or two. He is also working on two sequels for "Sin City."