Lumberto, The Mexican Lumberjack

Classic:

Lumberto is squatting in the backyard of several college kids. He lost his wife in a tragic lumberjacking accident (cut her in half, or in dos, through a tree trunk). The only reminder of his past love is the one tree in this backyard, where they had visited years ago and carved their initials. Now, Lumberto watches over the tree relentlessly.
The college kids are confused by the presence of this squatter character. They childishly chide him with insults and pranks and the like. They become perturbed as they realize he plans to remain there and as they realize his ungroomed social manners (watching people as they shower, j/o, eat, etc.).
Flashbacks reveal more about the Mexican lumberjack.
Tension builds between the two parties as neither can truly communicate their intentions. The slight language barrier (English/Spanglish) doesn't help the situation. The tension boils over when the tree is (accidentally/purposely?) cut down and Lumberto loses it. He goes on a killing spree at one of the boys' parties which may or may not be themed "living dead/murder."