Every time I see this thread is updated, I'm reminded of the guy doing pull ups from the roof of a sky scraper.
He has placed his phone on an edge, so we get a fly's view of him reaching the point where he's unable to pull himself up. Ends with him letting go. Horrible to see and is burned into my memory. I'll spare you the video here, but Google "pull ups" and "sky scraper" and you'll see.