He experienced lots of things.
I’ve often sat in front of an open word doc, ready to write about our experiences, but there’s a few bits of clarification I need and I don’t want to stir my mums memories up again. Also, it’s hard on me when I recall it.
But basically, the first thing my dad experienced was when he laid in bed one night when me and my mum were at my nans. He was laying there when he felt like someone had laid down next to him. He froze and after a few seconds he heard very heavy male breathing behind him. After a few more seconds, he broke away and went to the living room and sat in a chair with a hammer for the rest of of the night. All the time, he could hear banging and dragging sounds from the bedroom above.
A third party anecdote from someone who was home alone and heard some noises that got them paranoid... did he not go upstairs to investigate the banging?
Things going jump in the night is a rather common occurance - tends to have a physical explanation but can also be the result of people imagining or heightening things too.