I don't think you took the thread off-topic, and I hope Baron and others chime in.Reading back I notice that I took the thread a bit off-topic. My message was triggered by @Baron 's message, and especially the sentence he wrote in bold letter font.
I don't have experience with various forms of set extensions such as drop-sets, negatives or static holds after completing a full set. I have read about these, but haven't applied those techniques.
Struggling with the last few reps shouldn't really make the set more risky. Using a heavier weight than you are capable of handling and/or using "Body English" and/or momentum rather than strict form is what gets you in trouble.

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