Obsessive thought about movie scenes.

When I am working on something whether inside the house or out I have these obsessive thoughts about scenes in different movies and I can't get them to stop. It seems to me that it happens when I am doing manual labor (painting a room, planting, cleaning out the garage or fixing stuff in general). It is any movie genre but it only a couple of lines of dialogue in a scene. Once again it can be any scene from what I can remember. I have my ipod playing but the thoughts persist over the music.

Sometimes I get obsessive thoughts about an ex-girlfriend or lover when I am doing manual labor and they are not the best images for me which get me depressed even though I am married with 3 kids.

I was wondering if anyone had any thoughts (no pun intended)? I believe I have had it for a while but since doing hard therapy I am aware of everything that goes on in my head. Please help.

I am on anti-aniexty drugs and wellbutrin.