McDonald's has been celebrating the birthday of the Grimace this month, and participating store locations have a special Grimace Shake to celebrate. The shake has become the subject of a hilarious meme recently, with viral videos on social media depicting people suffering horrible deaths after drinking the shake. The official Sonic the Hedgehog Twitter account has now gotten in on the joke, with a Tweet today wishing Grimace a happy birthday alongside an image of Sonic dead on the floor with a purple colored drink spilled all over the floor.