I've almost posted about this veggie but didn't want to be shouted at and called a weirdo or an abuser. Happy to see this is common. Though I think I might have it worse than average?
I get the jumping off a tall building one, or throwing my phone off. Or into water. I have to physically stop and ground myself for a split second occasionally to shut out the thoughts on some bridges in London. I don't have the urge to, it's more I imagine it happening and it is so vivid it almost makes me dizzy, then I worry I will trip and really do it.
I do this when pushing our carrying my children, also by busy roads. Again I do sometimes stop and squeeze then tight and apologise in my head.
I imagine throwing boiling coffee on work colleagues, or groping or snogging them.
I imagine punching pregnant people, or children. Recently I imagined treading on some baby ducklings 
I hate the images. Maybe for me they're a very mild schizophrenia? They do seem to intrude a bit. But only for a split second, and I've never even come close to doing anything harmful to myself or anyone else.
I've got quite a busy brain, I always assumed it was related to that. When I don't have something concrete to focus on my brain chooses something intense to give me a prod.
Interesting some people relate it to anxiety. I don't think of myself as having anxiety. I am a pretty successful professional who you'd think has her shit together, but not quite high powered enough that you'd might assume I have issues of too much pressure. I've got a good work life balance, two lovely kids, an awesome partner, and tbh a pretty great life. I think for me my brain invents these little terrors to keep me on my toes, stop me getting bored.
I'll look up anxiety though and see if the Internet thinks I might have it, v interesting...