in-retrospect
Explanation
This is a single-panel comic with the caption: "In retrospect, the pop-up book of terminal illness was in poor taste."
The image shows a man reading a pop-up book. A skeletal hand -- made of paper, as part of the pop-up book's construction -- is reaching up from the pages and touching his face, giving him an expression of deep discomfort.
The humor comes from the absurd concept of a pop-up book about terminal illness. Pop-up books are associated with children's entertainment and whimsy -- they make content tactile and delightful. Terminal illness is the exact opposite: somber, serious, and deeply upsetting. The pop-up element (a skeleton hand reaching out to touch the reader) makes the morbid subject matter literally "hands-on," turning a grim topic into an inappropriately interactive experience. The dry, understated caption ("was in poor taste") adds to the comedy by treating this obviously horrifying product idea as merely a mild lapse in judgment.