Also known as: Thinkmark
A Meme originating from the eighth and final episode of the first season of Invincible (Series), which premiered on April 30th, 2021. It features Omni-Man trying to convince his son Invincible (Character) to abandon his heroic ideals so they could conquer the Earth together after his heroism was revealed to be a mere facade hiding his role as an agent of the brutal and expansionist Viltrumite empire.
If there's associated text, someone is usually saying "Think, [Character Name], think!", as per the original comic, though in the show, only "Think, Mark!" was said.