Worst optical illusion

I was driving my car on NH-8 and was struck in a traffic jam near Bilaspur. On both the sides of my car, there were huge trucks. There was some space created in the front. I moved my car slowly forward and felt I am going backward. I put a harsh brake not understanding why my car is going behind and I might not hit someone behind. I was confused. Bewildered me, took two deep breaths to calm myself and to analyse what had happened. My car was in the right gear to move forward even then I was moving backward. I realised that I had a worst optical illusion because of huge trucks on both sides of my car.