The only "bad" experience I had (with eyes open), even though it wasn't really bad, I was just a bit nervous, was when two 8ft tall gray aliens stood over my bed (like ghosts, so I could see them but also see through them) and started waving their hands around my genitals. It created a swirling force of energy. The aliens communicated without speaking, and I "telepathically" felt them being astonished and curious about humans. They were feeling into me with a powerful curiosity as if I was some kind of god, and that it was a once in a lifetime opportunity for them. They wanted to analyze the energy of individual sperms to feel their potential.
