I like to watch rare horror movies partly to contribute missing information about them, but also in the hopes that some of the rare ones are actually unjustly overlooked. This is one that definitely deserves a wider audience, though it is a bit light on the horror and a little more of a drama. Movies with tensions in a house between a strange outsider like Funny Games, or with a mysterious stranger with mysterious motives like Death and the Maiden come to mind.
A headmaster and his wife return home to find one of their doors to have part of a window pane neatly cut. Looking through the house for whatever might be missing, they find a young man sitting in one of their rooms, and the phone isn't working.
The man's behavior is strange, but polite. He says he's arrived from Australia and was friends there with an old friend of the headmaster. He proves to have a lot of personal knowledge about the family, so his story seems to be true. However, he definitely has a dark side, doing over-the-top "practical jokes," producing a gun, engaging in a particularly bloody boxing match. (There are a number of nice touches in the movie, like the acting of the old man handling the timer and bell for the boxing.)
The ending, well, perhaps a bit predictable (avoid reading too much of the box cover, or the synopsis on rotten tomatoes). Still, a pretty good movie overall and one of the rare horror movies to take place around Easter.