One key element is the threat. There has to be a real and immediate danger, like an attacker with a weapon or someone being physically assaulted. Another is the use of the taser at the right moment. If it's too late, it won't be life - saving.
There could be a story where a security guard was in a dangerous situation with an unruly intruder. The guard used a taser to subdue the intruder before the intruder could cause serious harm to others or themselves. This shows how a taser can be a life - saving tool in such scenarios.
I'm not sure which specific story you're referring to about a man testing a taser. There could be many such stories. It might be about a police officer training with a taser, or a civilian who got hold of one for self - defense and decided to test it in a safe environment. Without more context, it's hard to say exactly what the story is.
At a self - defense class, the instructor was showing how to use a taser. One over - eager student grabbed it the wrong way and when he tried to activate it, it just made a strange buzzing sound. He looked so confused as if the taser was playing a trick on him. The whole class couldn't help but chuckle at his bewildered expression.
He could have bought it because they live in a place where crime is common. He wants his wife to be able to defend herself when he's not around. It's a way of showing his care for her safety.
Here's one. A husband was imitating a zombie and chased his wife around the yard. His wife grabbed a taser (a fake one from a Halloween prop) and when he got close, she pointed it at him. He stopped immediately and started doing a silly dance instead. It was really funny to see him change from a 'zombie' to a dancing fool so quickly.
There was this couple. The husband loved to play pranks on his wife. One day, he hid all of her favorite shoes. When she found out, she chased him around the house with a taser (it was a toy one actually). The husband was running and screaming like he was in a horror movie. Eventually, he gave up the shoes' hiding place and they both ended up laughing about it.
Well, there was this time at a self - defense class. The instructor was demonstrating a taser. He aimed at a dummy but misjudged the distance a bit. Instead of just hitting the dummy, the taser wire got tangled around a nearby chair, making the chair jerk around in a really comical way.