The wedding anniversary

Bob forgot his wedding anniversary. His wife was mad. She told him "Tomorrow morning, I expect to find a gift in the driveway that goes from 0 to 200 in 6 seconds AND IT BETTER BE THERE!!!" The next morning when his wife woke up, she looked out the window to find a box gift-wrapped in the middle of the driveway. She opened it and found a brand new bathroom scale. . . . Bob has been missing since Friday.