Is it normal to repeat everyday events in my mind so much and make it strange

Every given time of the day i repeat things around me in my head over and over again.. This might not be that strange but it goes on and on and i change the subject a little bit every time so that in the end even the most normal things become absurd. Like a car passing by becomes flying cows and an alien invasion( that wasnt a real thought but it usualy gets this weird) . I think most changes i make when im repeating stuff are from previous experiences. Like when i have seen a tv show with flying objects i implant flying cows or something( that has even the slightest thing to do with the things i have seen) Srry for bad english or typos:) im not english or american