This has a genuinely intriguing opening and the movie never lets up in its unpredictability. The four-character ensemble, lost in a listlessness of their own making, take an unorthodox and ludicrous premise and roll with it. Of chief concern here is the fun of the Devil’s buttermilk – teachers giddying around in a desperate attempt to recapturing a lost stage of development – but also the Dark Side. And it gets very dark, booze an outlet for a deeper malaise.
The best tragicomedy I’ve seen in ages.
Wanderings and ... wonderings. 
I just watched this film too. I was blown away with the ending, the song it was a perfect ending to a great film.
I was rather fairly surprised by it.