I don't see anything wrong with it. Where vehicles are concerned, I went a step further. I found a bug on the sidewalk, made sure the kids saw it and then stepped on it, removed my foot and made sure they saw the squashed bug. Then I told them, "that's what will happen to you if you don't watch out for cars and I don't like squashed kids"
It's all true. You can no longer get trapped in a refrigerator, but there are still old ones around. My parents had a friend who lost an arm as a boy by getting it caught in the spokes of some vehicle. Kids aren't born knowing what is dangerous. We need to teach them. Most parents don't bother.
I teach these things. When we had an episoode with matches I actually googled burn victims and showed them exactly what fire does to people. They have never touched matches or lighters again.
When they gave me issues cleaning I made them watch hoarders.
I have showed them the danger in all of these things I think. (Grandchildren I am referring too, google didnt exist when my kids were little but I could have used it lol.
I have used google image search in teaching a lot of lessons. When having a discussion on monsters and if monsters were real I showed them Ted Bundy and told them real monsters were even scarier because they blend in. This was just the other day.