Maybe it's intentional, maybe it's not, but how fitting that a movie with a lead character suffering from bipolar disorder would almost feel like two separate films. The problem is that the two tones set up completely clash, and the better half of the movie requires sitting through a less interesting first half. That first half is the typical fare you expect from a Seth Rogen led film: crass jokes and obscene language galore, and it all starts to wear thin as the movie progresses. Around the midpoint, the film takes a strong turn and goes into rather dark territory: the raunchy yet light comedy is substituted with a strangely deep analysis of Ronnie Barnhardt's (Seth Rogen) bipolar disorder, almost in line with a dark comedy version of Travis Bickle. This segment is far and away the most intriguing, but it comes too late and the tonal shift is jarring. Rogen himself is actually close to his best here, and offers up a surprising amount of depth to a character you wouldn't expect as much from. Alongside him, Michael Peņa has a short but memorable stint, and Collette Wolfe is a charming addition to the cast.
It's a bizarre film that will appeal to people with a sense of humor in line with Rogen's, but others need not bother: while the last half and its surprisingly dark subject matter is fascinating for this kind of movie, sitting through the first half simply isn't worth it.