In the early 70's I was babysitting my little brother. I was in bed and around 11pm I heard the front door open and my mom said "we are home.", which was something she would typically do. I did not hear anything else I was expecting... like the door shut or them walking to their bedroom. After a few minutes I yelled "mom, dad?" and got no answer. I became nervous and got up. The door was shut. I opened it and looked outside. There was tons of fresh snow and no tire tracks.. I sat in the living room, perplexed. They soon arrived home and when I heard them pull up I ran outside to meet them. Mom said they were almost hit by a semi truck on the way home. Don't know if that had anything to do with anything.