1. The class is before noon.
2. Can't solve differential equations in my head.
3. Didn't do the class assignment and don't like to attend class unprepared.
4. The instructor knows no American English.
5. The class is all the way down at Herter Hall.
6. There is two feet of snow on the ground and you assume that class will be cancelled anyway.
7. That cute girl/boy wants to hang out for awhile.
8. Your girl/boyfriend is in town for the day.
9. You just took a test (or had one anytime that day).
10. The textbook weighs more than your refrigerator.