To do something with speed and efficiency.
It means "freeing the feet," that is, efficient and swift.
The mean distance is the same as the mean of a set of numbers,but this time, instead of them just being numbers, they're lengths. You just simply add up all the numbers and divide the total length,...
It means that you stick a firecracracker in a cows ear!
it means...that you mean what you mean:)