The GM: Makes a clearly overpowered monster, intending for the party to flee.
The Party:
[Picture with the text "Hit him with your crossbow Steve!" overlaid, of a large octopus/squid-like creature with tentacles raised out of the ocean. It towers over a pair of humanoid figures, one holding a staff in one hand and pointing at the squid with the other, the other person aiming a crossbow at it.]