From Maceió, AL, Brazil comes this interesting video. Here’s the description, which describes the man doing the rappelling as a firefighter:
A drunk man threatened to jump from his apartment’s balcony and the firefighters were called. After hours, when he went into the apartment and everybody thought that the case ended, he suddenly jumped, but a firefighter was rappelling the building grabbed the suicide. Although the hard trip down, nobody was hurt.
UPDATE: Below is a news story that seems to erase any doubt the man doing the rappelling is a firefighter.