Successful surströmming challenge guideline: 1. everyone stays within the camera range - never ever go outside. 2. Prepare the challenge seriously by having drank plenty of water or preferrably milk beforehand. 3. If you want to puke, do it towards the camera - not away from the camera. 4. Everyone stays until the last person finishes. 5. Many bonus points if you puke on your neighbour. Btw, I am from Sweden. You are welcome.