Critical Kush is a strain that's been around for a while, but it's still one of the most popular strains out there. It's an indica-dominant hybrid with a THC level around 18% on average, so it's not for beginners. If you're looking for a strain that will help you relax and unwind, Critical Kush is a great choice. The effects come on slowly—you'll start to feel calm within an hour or two of smoking, and then they'll start to build until they leave you completely numb from head to toe. The high from this strain is ideal for those who want to get things done without getting distracted by their own thoughts, whether that means working on a project or just trying to get through dinner with the family without getting lost in thoughts about your next vacation..