K2 is a synthetic drug that is sold as incense but is smoked for its psychoactive effects, which are similar but more intense than marijuana. It contains chemicals sprayed onto plant materials that are not intended for human consumption but are smoked to get high. K2 can cause severe adverse effects like increased heart rate, vomiting, anxiety, and even heart attacks. Personal testimonials describe terrifying experiences from using K2 and urge people not to take the dangerous drug. While similar in appearance to marijuana, K2 is not safe and its effects are much more intense and unpredictable than weed.