School is so serious, it's often tempting to spice things up with a doodle or two. In fact, some textbook doodles are so good they live a life of their own. Sometimes teachers are chill about it and offer another doodle. Other times, especially if you're drawing a sad face on a test you're absolutely bombing, you're unlikely to get such an enthusiastic response. These Twitter users ran the gamut of what happens when you include a few Easter eggs in your test.
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