DL flight into PHX last spring. As we're making the initial descent, it gets very bumpy. They continue down. As we're approaching the runway, the tail seemed to spin left. All the sudden they abandoned the landing and took off. We flew in circles for about 30 minutes. Apparently, Phoenix was having a very rough thunderstorm on the ground. I typically take Dramamine before flights. I was thisclose to throwing up. Apparently there were a LOT of people who did throw up. The pilot actually made the announcement to be sure to bring the bag of vomit with you to throw away and not to leave it in the seat back pocket. That was not good.