I have this but its part of the anxiety i have ocd primarily obsessive.. so i really fear acting on these thoughts and urges .. its hard to explain its like a little second video that plays in the mind as your muscles tense up and you see yourself punching someone in the face or whatever else it is you fear, i have sat on my hands the urge was so strong and i was certain i was going to lash out, have had these thoughts and feelings for over a year and besides crying or being snappy/moody i havent acted on them. I actually get them so bad that i avoid being around people, its scary to not trust yourself.. for me it has everything to do with fear of losing control as I get these thoughts even around people i would never want to hurt.