Frustration - its sometimes so overwhelming I'll cry while being angry, its kinda complex as there are lots of emotions in that mix (like guilt to get angry)
One time I was asleep or half asleep and the image of a blender on a black background popped into my head out of nowhere, and I felt the most intense feeling of dread, and the most intense feeling of any kind, that I've ever felt. I don't know why that happened.