"Brian Gerard "Kato" Kaelin" is an United States/American radio and television personality who gained fame as a witness during the 1994–1995 People of the State of California vs. Orenthal James Simpson/murder trial of O. J. Simpson.

More Kato Kaelin on Wikipedia.

It's a show where I go across America, I knock on doors of the unsuspecting and invite myself in to spend a weekend with the family.

From behind you where you were sitting?

Did you notice anything occur in your room as a result of those thumps on the wall?

Right, from behind the wall from where I was sitting.