in-your-house
Explanation
The Joke
A woman receives a phone call from someone asking "Hello?" She responds, and the caller reveals increasingly specific and creepy information: "I'm in your house." The woman is alarmed but the caller continues in a mundane way -- they keep a house in Maine, and a small one in Florida for the winter. It turns out they're staying in a hotel while the Maine house is being fumigated.
The woman, increasingly confused, asks "Who gave you this number?" The caller explains it was probably a realtor who mixed up their contacts. Then the caller says: "But they're sorry. Even check the calendar or the fridge. They would've left a note." The woman sees notes from "Starbucks" and other mundane items, confirming this is just a confused house-sitter or someone with a wrong number situation.
The comic ends with the caller asking "Hey, you wanna get a beer?" and the woman's reaction suggesting this whole terrifying home-invasion call has devolved into a casual social invitation. The final panel has someone calling it a "classic."
The Humor
The comic subverts the horror movie trope of the threatening phone call ("The call is coming from inside the house!"). What begins as a classic slasher setup -- a mysterious caller who knows where you live -- is gradually revealed to be a completely innocent misunderstanding involving real estate, snowbird lifestyles, and mixed-up phone numbers. The humor comes from the gap between the terrifying framing and the utterly banal reality. Each new detail that should escalate the horror instead deflates it further into mundane domesticity. The final "classic" comment suggests this kind of anticlimactic mixup happens regularly.
References
The comic parodies the classic horror trope "the call is coming from inside the house," originating from the urban legend of "The Babysitter and the Man Upstairs" and popularized in films like "When a Stranger Calls" (1979).