Deep Thoughts...

[ZOA NOM]

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[red]

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Anonymous forgot to say, "jury rigs" or improvised repairs, on that list.

Almost any equipment failure at the wrong time can cost more than a rider can pay.

[krusty]

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Anonymous forgot to say, "jury rigs" or improvised repairs, on that list.

I think the above would be covered by "ignorance" and "incompetence".
A good list to keep in mind.

[Tuned forks]

I've seen the same saying in regard to flying an airplane.  Both are unforgiving.

Joe