I Believe In Ghosts

my friend said his blinds were moving back and forth last night. what's scary is no one was in the house to move them. plus one time his wife went in the bedroom to take a nap while he was in the other room she felt something grab her arm. it's just them two living there so idk what else it would be. plus the house is over 100 years old so who knows how many people have lived there and what happened in it. he lives in the country and has a trailer and a house. he was sitting on the back porch when he saw it