Do you mean the original trigger in the book or the revised version here? I think sneaking under the radar of a watchman absolutely counts as "acting quickly in the face of danger." What do you think?
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Okay, I see. Maybe it's not "acting quick" but could it still be "thinking quick"? Either way I would definitely say that kind of sneaking counts as Acting Under Pressure. I'll think about updating it, but definitely you should play the way that makes the most sense to you, and tweak these if necessary!