If you're six feet tall, 10 miles per hour probably doesn't feel very fast. But what if you were just six inches tall, like a squirrel? Relative to the size of your body 10 mph would be quite a bit faster. This site shows the top speeds of animals, and how fast they would be going if they were your size (ie, what their speed feels like to them).
Animals: land air water insect | Graph: top speed feels like |