I have a vivid memory of being driven to my first day of High School by my mom. I was nervous to near panic attack proportions that I was going to be late. A worry that lasted until we got close to the school and I replaced it with a panic about being too early.
I'm finding writing a paper to be very similar. "Oh my god, oh my god, I'm never going to have enough data. There isn't enough stuff here! I don't have enough to show! ... Oh, crap! I've got 9 figures. I have to cut!" With barely a pause in between.