What is your question, exactly? Have we seen any stage screw-ups? Have we been a part of any? Can we think of any? The exact question is unclear.
Perhaps the OP is asking for names of people who are known as 'screw-ups"?
Or perhaps this is a hardware question. For most of our sets, we use Phillips head screws of varying lengths.
Stand-by Joined: 1/12/16
Which brings me to my favorite bad backstage joke:
Q: How long is a stage screw?
A: Depends how long the blackout is.
I'll see myself out.
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