Picture this: you have an 8:10 a.m. class. The professor ends on time, so you get out at 9:25. Your next class starts at 9:45. That’s plenty of time to walk across campus, right? Yes, but not if you’re going to the Spring Valley Building. The 20-minute break between classes is barely enough time to make it from Kerwin to Spring Valley. If your professor holds you for an extra three minutes, you will almost definitely be late to class.