They come and go. Like today I had been hunting and saw the rifle catridge full of powder I had been using to prime my pistol. The intrusive thought was, "I wonder if that would fly off like a rocket if I lit the powder." The intrusive impulse was to do it. And while trying to talk myself out of it in my head, I used an old receipt to lay a trail of powder to the catridge and struck my lighter. It blew up in my face and I now have 2nd degree burns on my thumb, but it did shoot off like a rocket. I could even hear it whistle through the air...