Worst case of this I have ever seen, was when some one was fixing a head liner to a deck. His screws were far to long, and his driver very fast, radio on loud and cracking on with the job until some one stuck their head in the boat a hollered at him to stop. He had put one of his super long screws straight into someone's heel and fixed them to the boat.
Trouble was quite a few had gone in since then and he had to work his way back to get the attached guy free. Just imagine watching the screws disappear as you wait for the one to unwind from your bone. Ouch!
But I may be talking Rubbish.
Expurt is a drip under pressure, and the difference between an Amateur and a proffesional is getting paid.