This happened to some family members of mine recently while they were visiting my aunt and uncle in Mexico. I might've mentioned that my dad passed away this past spring and while he died in the U.S. He was buried in Mexico, his home country. At my aunt's home he had his own bedroom where he or our family would stay during visits. We actually stayed there for a few days for the burial and aside from some bug bites didn't experience anything out of the norm.
The other day, my dad's cousins came to visit my aunt and uncle and they stayed in my dad's room. Early in the morning my aunt, whose bedroom is another building not connected to my dad's bedroom heard a voice sounding very much like my dad's screaming her name over and over. She woke up very stunned and figured it was a dream. She got up and looked around but didn't see anything. Then the cousins came in all scared and said that something had attacked them in their sleep and held them down in their beds. One of them said he felt that something was hitting him on his back over and over again and tried to suffocate him.
My aunt took some holy water and sprinkled it but the cousins said they just wanted to get there things and leave as fast as they could. They have vowed never to stay with my aunt and uncle again. The last people who had stayed in that room prior to the cousins was my dad's 2nd wife who stayed some extra days there after the burial. She didn't experience anything and like I said, neither did my mom, sister or myself. My aunt called my mom and told her what had happened and my mom said she had a dream about my dad that day as well. I don't know if this was all connected but what happened to the cousins was scary. These were cousins that my dad grew up with and was very close to them so I don't know why they were attacked. My mom thinks maybe it was my dad throwing them out because he could be very territorial about his things. But at the same time I want to believe that my dad is at peace and in a good place, not some angry spirit throwing people out of bed.
Anyway it's just scary to think about and don't know what it could have been. No one has stayed in the room since and they said they were going to get the room blessed. This story really freaks me out.