Kylie Jenner and Kendall Jenner made light of their physical altercation while it aired on Keeping Up With the Kardashians.The pair live-tweeted with fans during the Thursday, October 8, episode, which featured Kylie, 23, and Kendall, 24, fighting in the car during a family trip to Palm Springs.One fan posted a GIF from an old clip of the Kylie Cosmetics founder and Kendall slapping and kicking each other in the back seat of a car as children.