Back when I was around 7-8 years old my brother, older by one year, and me tagged along with my parents to pick up my father's friend and his kids from his house so he could stay at ours a few nights.
Everyone knew his house was haunted by ghosts but we all just ignored it. We kids would play hide n seek and tag/tiggy but we would never go close to underneath the house because that's where the bad spirit resided. The other kids would say that this spirit would push you and speak strange languages in your ear.
Apparently he had been partying with mates on a binge for 4 nights straight and this aggravated the spirit living upstairs. My parents said when they walked through the door there was smashed cups, dishes and cutlery all over the place with flipped furniture. My father's mate was emotionaly drained and wanted get out of the house, the kids wouldn't leave the room and it took a lot persuading until they finally came out.
While all this was going on my brother and me was still in the van waiting for them. Then all of a sudden the AM/FM radio started moving from left to right switching between channels, it keep moving we heard this bone chilling laughter comming from the radio. As soon as that happened I heard my mother scream as she fell down the stairs. My brother and myself jumped to the back of the van and hid behind some chairs until they got back.
The story was they were carrying a mattress down the stairs and the bad spirit, which sometimes would be under the stairs, grabbed my mother's leg and tripped her, causing her to fall. After that happened everyone agreed it was time to go so they just grabbed what they could and we left soon after.