They know what's coming.
Some might have put on a brave smile, others a wary eye with a slightly furrowed brow. There's something about anticipating the sting of a direct hit with a stun gun on bare skin is bound cause some anxiety.
Then came their reactions. Mouths formed painful ovals as eyes shut tight in slow motion and neck muscles tensed. Others seemed to power through the pain, determined to maintain smile, while their fellow stun gun victims flailed about.
Finally, when it all was over, a look of sweet relief graced their faces.
Watch the footage:
Believe it or not, the people doing the stunning had a reaction of shock all their own. According to photographer Patrick Hall, who produced the video and took portraits of the people, the stun gun subjects were shot by a friend or significant other, which he wrote "created an interesting dynamic in itself."
Watch the reactions of those shooting the Tasers in this extended cut:
"The emotions on both sides of the taser were extremely entertaining to watch," Hall wrote. "The person getting tazed was almost always nervous and jittery with either a sense of fear or anxiety. The participants doing the tazing had a different demeanor altogether. Most of them were excited to cause pain to their friend and only showed remorse immediately after executing the shock."
Why would an artist drum up an idea to shoot people with stun guns and record it anyway?
"As a portrait photographer, I am always trying to make people feel comfortable in front of my camera so I can capture a real emotion from them," Hall wrote. "But what if I was able to make people feel so uncomfortable in front of the camera that I could guarantee an interesting portrait every time?"
"There's no way you can fake your emotions when you get hit with 300,000 volts of electricity," Hall said in a video where he explained some of the behind-the-scenes content.
Why the bare shoulders? While you might think it was to capture some of the reaction of their muscles when they were hit, from Hall's perspective it was so clothing wouldn't be a distraction. Women were wearing tube tops that covered the rest of their bodies.
Overall, Hall found the result of his project "pretty hilarious."
Learn more about Hall's Taser Photoshoot on the website Fstoppers.