Remember watching Joaquin Phoenix's infamous Letterman appearance? How his bewildering behavior never quite revealed whether or not this was all an elaborate hoax of Andy Kaufman proportions?

Remember watching Joaquin Phoenix's infamous Letterman appearance? How his bewildering behavior never quite revealed whether or not this was all an elaborate hoax of Andy Kaufman proportions?

Well, "I'm Still Here," the film document of that year, doesn't quite answer that question. In fact, it adds even more layers of strangeness. Is it fake? Not sure. Either way, it's nearly impossible to look away from.

Phoenix publicly announces his retirement from acting, then says he's going to pursue a hip-hop career (a field in which his apparent passion wildly outpaces his talent).

Phoenix's mind seems as wild and unkempt as his signature beard, his ramblings both paranoid and occasionally profound. We watch him unravel while behaving like a rock star, scoring drugs and ordering online prostitutes with the glee of a kid on Christmas morn.

So, is this an unbelievably raw portrait of a celebrity breakdown or an elaborate sick joke? Time will tell, but if it's the latter, Phoenix deserves an Oscar.

Directed by actor (and Phoenix's brother-in-law) Casey Affleck, the film certainly has trainwreck tendencies. But as such, you kind of have to look.