Doom & Death
Ill make a post about this one day, but about 3 years ago I was watching my two little brothers (twins) when a black mist or fog started to creep up the stars.
It was very subtle at first but then it became more opaque and a weird humming or whispering started happening and a feeling of dread and death loomed over me. I thought that I was just tired and was imagining things when my little brothers started to cry and feel scared.
At the same time my 4 dogs were going insane barking and growling at the weird mist thing. It only ended when my entire family walked through the door coming home from the store.
It did not go away imminently it was around 30 seconds before it dissipated. I don't believe in the paranormal in any way and to this day I cant explain it.