I worked my way through college crewing on a 143' schooner. Got up to the main speaders in a chair and noted the wooden block had its pin hanging half out. No safey line of course ( this was 30 years ago-who needs a stinkin' safety line?) I hollered for a hammer to be sent up on a gant line, tapped it in , and continued on with the job. Cripes. Now when I'm 10 ft off the deck I have more lines tied to me than Gulliver.