As per the OP,
yes I get some very, very disturbing thoughts. I sometimes feel obsessed that there is someone in the house, in my car back seat, hiding behind doors etc.
Last month, in the midst of my worst panic attacks, I was scared to death because I got these "flashes". I felt extremely nervous during and right after my panic attacks. One time I was walking on a busy sidewalk, just following an intense exercise session (I was also stpuid and ate some candy afterwards). I brushed up to someone beside me and then I "flashed" that I grabbed this person and through him on the sidewalk. The adrenaline was so intense. I thought I was losing my mind. The flash seemed so "real" and almost impossible to deny.
But I have been reading a lot and these disturbing thoughts are very, very common. Anxiety does not lead to Psychosis or Schizophrenia. There's a huge difference between thinking it and actually doing it and your mind will shut it down. Feels awful though.
As they say in Pulp fiction..thinking and doing..not even in the same Ballpark, not even the same F***** sport!
I'm reading DARE and the author says you should embrace these anxious thoughts. Don't fight them. Ask for more. Try to think up even more disturbing thoughts.