Ghosts
"You mention ghosts. So far I have experience, the best way to remove them is to chant Hare Krishna very loudly and have jubilant kirtana until they leave. In England, on Mr. John Lennon's house where I was staying in 1969, there was one ghost. But as soon as the devotees began chanting very loudly, he went away immediately.” (Srila Prabhupada’s letter to: Damodara—Delhi 71-12-03)