"House slap",,, fairly comman in Bigfoot habituation cases, generally when The Bigfoot is attempting to initiate some type of contact. It happens generally once the people at the residence are becoming aware something is around and starting to get an idea of what it is. The Bigfoot are just saying " yep it is what you think it is". Generally this is a point where the real interaction can begin, but generally does not due to inability of the people to open their minds enough.

Generally after dark when everybody in the house is quiet something smacks the side of your house really hard, obviously to get your attention. In some situations this happens frequently, to the point it becomes a nusence.