It's takes effort to achieve anything great, and sometimes great efforts can make you look, well, a little crazy. This truth is no different for man's best friend, as revealed by photographer Seth Casteel. In the photo series (and now book) "Underwater Dogs," Casteel reveals the lengths to which our dogs go to to fetch a ball underwater. Though the series is definitely hilarious, with all those flapping gums and gnashing teeth, we're just glad that these expressions are still hidden most of the time.
via The Telegraph.