A character (usually cartoon) goes through an oddly-shaped hole and comes out molded to fit it.
Needs a Better Title (Proposed alt title: Extrusion Effect, Hole Shaped Man)Toons are even better at it. They can work their way through odd-shaped holes or holes seemingly too small for them-- and due to their pliable nature, they come out shaped like the hole. Sometimes just parts of them get reshaped by the hole, such as a limb or (more often) part of their face. Generally a slapstick Western Animation trope, though there are some examples in other media. It has also become slightly more feasible in live-action works thanks to the magic of CGI. Related to Squashed Flat. Inversion of Impact Silhouette, where the character shapes the hole. Compare Dinner Deformation (which reshapes a character from the inside), Traveling-Pipe Bulge.
ExamplesAnime & Manga