“Day 8: Had a bowel movement.” This pretty much sums up the execution of a promising premise: A man goes into the woods to die deliberately, via starvation, and keeps a journal that is eventually found alongside his frozen corpse. A narrator reads passages from every one of the man’s 62 days of death, excruciating enough, and made more so by a slow and tedious delivery interspersed with overlong footage of nature. Cut out apropos-of-nothing B-roll, shrink it to about 10 minutes, and put it on public radio, and this doc could live up to its idea. As it stands, it’s an 87-minute exercise in because-I-can filmmaking.

On Wednesday, June 17, at 9 p.m.; also on Sunday, June 21, at 7:30 p.m. at AFI Silver Theatre.