I don't believe in spirits and only in other creations may be existing somewhere in other planets (Jinns?)
But I know one story which I never believed myself but my uncle believes it. One of my uncle's friend is a lawyer by profession and he was passing close to our street. There is a graveyard and it was early morning and he was travelling with his relative. Suddenly somebody came out of nowhere and hit with the car. He saw his dead body on the road but continued moving fearing he has killed somebody by an accident.
After an hour or so... he came outside pretending to be jogging and went to that street again assuming there will be plenty of people surrounding the dead body or the blood on the road but to his surprise, the road was as clean as ever and there was no sign of car crash. The incident took place just outside the graveyard so he started fearing it might be the spirit
I don't believe him but thats what he claims