I have just gone to my local out of hours store, and had a horrible experience that has left me shaking 2 hours later. The store has 4 parking bays running parallel to the store. A guy in front of me drove into 2nd space and I drove into last space which is for disabled and then started to back into 3rd space. The guy behind was still sitting in his car. As I was backing he blared his horn at me and stated to shout out me that I had left no room. My parking sensors hadnt started beeping so knew I was still a long way off). I braked and as he carried on shouting i doubted myself so I moved forward slightly, thinking he was leaving. He wasn’t so in the end I had to leave my car with a 1 meter gap and over 2 parking spaces. I went into the store and he followed me. I said I didn’t think I was too close as my parking sensors hadn’t started beeping, but he started shouting at me telling me I had left him just 1inch. He then told me to F off and I just stood there speechless. The shop assistant came over and told both off and told us to both stop. I carried on shopping and waited until he had left and tried to apologise to the shop assistant as I have never had an argument in my life and wanted to cry. He remained outside the shop standing outside the car and my legs went to jelly, but after spending ages shopping left and made a dash for my car. I am now wondering if I was being unreasonable?