Mind Fatigue

Any idea why it's always the last bit of something that takes the longest? The last hour of a long drive, the last ten minutes of a boring movie--the last day before a long vacation. I'm tired, and I want to be gone. Just 40 minutes left until I'm done with work, at least. It's been a long week, which makes little sense--since it only had 4 days. Oh well. I'll be on the road tomorrow--have a nice weekend, all, and I'll post again next week.