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human
[Cool Runnings] That loose bolt

So I am watching Cool Runnings again and I have a massive issue.

The whole finale and the crash and them wiping out is basically caused by that loose bolt right. Yeah the sled was a piece of shit, needed some love ans care.

Now I don't know much about Bob Sledding, but wouldn't a very basic thing to do after every single run be basic maintenance? Like a check of things like that? Of bolts, making sure everything is tight, and oiled, well maintained?

It really bugs me.
gpt
Mostly likely the team did check and perform maintenance on their sled, yes.  Certainly Irv was a knowledgeable coach, and Derice was a conscientious captain, so with their influence it's hard to picture the team skipping out on their maintenance duties.  

So why did the bolt get loose then?  Most likely it was due to the sheer age of the sled and the wear and tear it'd been through already.  Team USA had been using the sled as a practice sled, which meant it had probably gone through multiple runs a day for who knows how long.  There's also no guarantee that proper maintenance had been performed on it by Team USA, because again it's just a practice sled.  So there might be minor issues with the sled, such as a bolt's threads no longer being tight enough, or certain parts or cables rubbing against the wrong places during runs, or excess vibrations running through certain parts of the sled when it's in use. However, these problems might not be caught or even detectable during maintenance by the Jamaicans.  

But as we see, when you're going downhill at a million miles per hour in a slippery-slidey missile, even the smallest defect can become a major issue.