Have you ever looked at this scientifically, or looked at what's more likely? You saw a dark shape whilst squinting at the sun which disappeared later. Stare at any light and you will see a dark circle for a few seconds, why would you jump to a supernatural explanation? Or even if there was a person walking and they proceeded to fall down a hole, which then unfortunately collapsed etc it would still be more likely than a supernatural explanation. We know holes exist, we know how gravity works and we know it could happen, we also know what can't happen. There is a very simple scientific answer