I was in a really bad car wreck and was saved from injury by what I believe to be an angel. I felt something holding me just like a safety harness, but the vehicle I was in had no seat belts, and we crashed at over 70 mph. The five cars we hit were completely totaled. I should have been killed but survived without a scratch. Experts can't explain the accident. It defies science completely.
I was at a Christian campus dormitory when I experienced a demonic presence. I told the caretaker who informed me that I was the third person to tell him that. It was very real and unnerving. I heard it walking, felt it staring at me, and even a scream when I denounced it by the power of Christ.
I have more stories, but these two are the best. I don't believe in ghosts of dead people, but I do believe in angels and demons. They are very Biblical.