So this particular encounter will require some backstory, my apologies if it is a bit long winded.
Both of my parents where born and raised in the same small village in El Salvador. It's really far out in the country side at the end of a dirt road. The village is called La Aldea on the Chalatenango region of the country. Like many other countries we have our share of folk lore and super natural beings, the most famous being La Sihuanaba. She has many origin stories (the one I heard was that she married the devil himself and gave birth to a wicked offspring). But for all intents and purposes anytime anything happened that seemed paranormal or unexplainable it was credited to La Sihuanaba.
My parents took me and my sister down to visit both of their families around the time I was 7 or 8 (1989 or 1990). We were staying at the home my mother grew up in and staying with my Abuelita (grandmother) and some of my Tias (aunts) and Tios (uncles). My mother was one of 12 kids and this was their family home. It was not built for that many kids growing up, the village itself was rather poor.
One night early during the trip my Abuelita made her way down to the church in the village for weekly mass along with a few other relatives. Others stayed behind and just hung out in front of the house. We were between a chain link fence and the front door. About an hour and half later (I would say about 8pm or so) many of us - myself, my mother, some cousins, aunts, & uncles - saw my Abuelita walking back from church on the one road of the village. She walked into the front yard through the fence and into the open front door. We all greeted her as she walked passed us but I cannot remember if she greeted us back. We found nothing odd about the situation at all.
About 5 minutes later my Abuelita was walking through the fence accompanied by the same family members she went to church with earlier in the evening. Needless to say we were all very confused. All the family that stayed behind asked my Abuelita how she got back to the church without us noticing her. The only other entrance to the house was a door to one of the two bedrooms and it was also on the front of the house where we all would have seen her. She proceeds to inform us that mass had just ended and they had just left the church. She was just as confused as we were.
As soon as those words left her mouth we all started screaming "it was La Sihuanaba!".
When we saw the doppelgänger we didn't feel any sort of unease/dread/etc. Or at least I didn't. But the fact that this was a group experience shared with a bunch of family makes it all the wilder. This is one that I'll always remember.