For me, it's been a while. But in editing my latest project, I found myself feeling what I call "that tingle." I get an itchy crawl on my scalp and a tingling sensation. Some might say it's a shiver or a cool rush. Maybe a heat flood in the face. I bet everyone has a different kind of physical reaction, but mine makes it clear: I'm reading something unforgettable.
Essentially, I've read something that wowed me to a degree that my body had to put up its hand and get noticed. I've written a few things of my own that give me that feeling. I have a short called "Through the Transom Light" that does it. Another one called "One Hour's Reprieve" makes me shiver once I get to the end. I also have scenes in "Devil's Right Hand," "On The Gathering Storm" and "Bled" that prompt an uncontrollable reaction.