I had this happen firsthand - witnessed two cars racing on the street, one hit a light pole, the other ran off.<p>I even knew at the time that eye witness testimony could be unreliable.  I tried to keep in mind the description of the other car as I waited for the officer - and accidentally overheard another witness describe the car.  I immediately could no longer discern whether the color in my mind was the real color or a newly formed memory.<p>It was super frustrating ... And frightening.