A particular genre of graphics is designed to induce awe: certain bits are allowed to stick out like a sore thumb. Via reader Andre L., and an archive of US Army medical photos and illustrations:
This is a small multiples graph designed to display the somewhat seasonal pattern of deaths due to influenza over years. Basically, we see a U shape in almost every year; however, the height of the peak, and the timing of the peak shows quite a lot of variation. Further, some years exhibit more of an L-shape than U-shape.
But the attention grabber here is the massive peak that occurred between 1918 and 1919. It was unusual in many ways... it was the second big peak during 1918, it occurred late in the year and ellided with the next year's peak. The designer allowed these two components to bleed into the other charts.
From the perspective of scale, readability, cleanliness, this bit sticks out like a sore thumb! But one has to say it is effective.
A log scale is often used to deal with data containing such outliers. But while this makes neater charts, the impact of the orders-of-magnitude difference is lost on the reader, except in her imagination.