Cabin Fever 2: Spring Fever (Ti West, 2009).
Confused, rank and not a little dull, I only recommend this to Mark Borchardt fans, as he pops up near the end, maaaan! Ahem.
And didn't notice until too late that El Topo was on Film4!!!
Don't know MB?
Then I heartily recommend
American Movie (Chris Smith, 1999), which is in turns hysterical and slightly heartbreaking imo....