Softball and baseball are two sports where you really need to concentrate and focus on the game. Both of these sports have long periods waiting for key moments that happen quickly.
Seen in this photograph, a Saugus player reacts after a Swampscott runner was called safe at second base. The umpire called the runner safe due to the Saugus player having her foot off the bag. I like how the Saugus athlete is pointing down at the bag as she looks towards the umpire.
Nikon D4s, 1/2500 @ f/5, ISO 400, 70-200mm with a 1.4 teleconverter