Hi,scatmantom
Actually you have a tendency to OCD, in OCD, there are 2 conditions, one is unwanted thought or action, the other is "counter unwanted thought", means you are making efforts to repel or eradicate such thoughts, the conflict between them will lead to OCD. Maybe you are not severe enough, or the frequency of meeting such situation is quite low (only in the cinema), so you don't feel it is OCD. So here I will give you some suggestion to stop it in the early stage:
1. According to Newton's law of force and counter-force, how forcibly you repel such thoughts, how forcibly it would counter-attack you, finally you are bound to be the loser, just like if you try to lift yourself up by pulling your hair, you will never succeed, and furthermore, you will suffer from pain and ache. So now stop any conscious efforts against such thought, you will never defeat it, from the bottom of your heart, surrend to it. saying to yourself:" OK, I give up, if you want to come for me, just come".
leave a space in your mind for your unwanted thoughts and feelings, let them burn there themselves, finally they will go out themselves. but it needs time, it is a process.
2.attend more sports, sports are good for the treatment of any neurosis such as generalized anxiety, SP and OCD. I suggest you to do some long-distance jogging, tennis, badminton,swimming, or anything else which need quick response and energy consuming. they can fully reanimate your muscle and rusty brain which has been long immersed in anxiety. When you are exhausted, your anxiety will also be relieved
I don't know whether you understand my words, more questions, please ask me here