Yes, many. One I particularly recall many decades later was about my dad shortly after he passed away. We were riding in an invisible vehicle (kind of a go-cart), very close to the street. I was steering, he was seated behind me. It was a leisurely, very pleasant ride until the car started speeding up and then got out of control. As we rounded a steep curve, we tipped over and were thrown into the grass. He disappeared, and I suddenly realized he was dead and I was alone.