Similar experience here.
I find that as my internal dialogue begins to loop, my frustration grows with being unable to break the cycle. I have an awful temper (see: anxiety disorder) that seems to stem from this. Often if I've just lost my temper, postmortem introspection/analysis indicates that I was thinking the same <5 thoughts in a row in quick, vicious succession until something "short circuited" and I quit thinking altogether - just angrily reacted.
