As you can see from these unedited (I swear!) photographs, ghosts like to bowl, too. You wouldn’t think they would because the bowling ball would be so heavy… but the supernatural probably defies the natural laws of gravity. If the ghosts like to mess with the human players, it would explain why the bowling pins would sometimes seem to randomly and amazingly fall, or not.
It also seems as if the ghosts can take on the form of nearby living humans because some of them resembled my friends. I did not tell anyone in the group what my camera was picking up because I did not want to scare them and ruin their fun.