I don't think of any sentence as a "one-liner", but I do pay attention to how people actually speak when they are being funny. Rhythm is key.
Lorrie MooreAs the most recently arrived to earthly life, children can seem in lingering possession of some heavenly lidless eye.
Lorrie MooreI had never feared insomnia before--like prison, wouldn't it just give you more time to read?
Lorrie MooreHer life her life had taken on the shape of a terrible mistake. She hadn't been given the proper tools to make a real life with, she decided, that was it. She'd been given a can of gravy and a hair-brush and told, "There you go." She'd stood there for years, blinking and befuddled, brushing the can with the brush.
Lorrie Moore