 Save big on back to school with Staples Hot Deals. Right now, 24-pack Crayola crayons and comp books are only 50 cents each at Staples. Spends 824 in store only, limit 30. I'm Kareem Abdul-Jabbar. I learned about atrial fibrillation the hard way. My symptoms would come and go. Shortness of breath, fatigue. I kept going. Then I got so lightheaded, I couldn't. My doctor said I have AFib, so I'm about five times more likely to have a stroke.