That's the premise of Short but Sweet, a two-minute animation by Dutch director Junaid Chundrigar. If you saw Thor: Ragnarok in a Dutch theater, this short was in front of it as part of the "Ultrakort" initiative by Pathé, Studio 21 and the Dutch Film Fund. Normally I can't wait for the film to start, but these "ultra-shorts" have a maximum length of two minutes and are often very creative and inventive.
Short but Sweet is a fantasy spoof, and despite being only two minutes long, Junaid has managed to cram most of the genre's annoying tropes into it. The end result is pretty hilarious and had the audience I saw it with in stitches afterwards, and properly warmed up for the main film.
Now that Thor has left the Dutch theaters, KLOMP! Animation has published Short but Sweet online, and you can check it out below. Have fun!