I'd seen bits and pieces of "Infinity Train" on YouTube, but found the 10 episodes of season one on Dailymotion! I did wonder what Tulip was running away to/from, as she went from car to car. Essentially, Tulip had to face "the way it is" rather than denying/running away from changes. So, just like Dipper and Mabel Pines found out in "Gravity Falls," The Future is scary and unknown, but it's better face it than "stay in a bubble."