American Werewolf is dark, funny and suspenseful and even after all these years it's still entertaining, actually it has become more entertaining with age.
In this black comedy, David Kessler and Jack Goodman (David Naughton and Griffin Dunne, respectively) are two American students on a backpacking tour of Europe. Wandering the backroads of gloomy East Proctor, England, they find a pub where the unhelpful locals act suspiciously strange. The unsuspecting boys flee the pub in search of lodging after being warned to avoid the moors. Lost in the dark countryside, the pair is attacked by a werewolf. Only David survives, waking up three weeks later in a London hospital. As David begins to regain his memory he is tormented by nightmares and is visited by his dead friend Jack, who warns David that he will turn into a werewolf with the next full moon--and that the only way to lift the curse is to kill himself.
Some people hated the fact that movie did lack a successful ending, but in my opinion it didn't. You get what you expect and that's not a bad thing.
The movie has a lot of laughs and also a lot of creepy moments. It successfully blends horror and humor which is accomplished a lot less than you might suspect, but this movie really pulls it off.
If you haven't seen this one, put this on top of your list of movies to see.
Also, this film has the best werewolf transformation.