From left to right we have a dancing (?) guy with his face cropped off, a row of dudes with their heads cropped off, the blonde girl in the flares, the old guy staring into the camera thinking "what are you taking a picture of?", and the guy entering the scene on the right who is in sharp focus. The energy and dynamics of this image thrill me. Put this one in the dictionary under "snapshot aesthetic."
If the sunlight wasn't shining on the chair at bottom right, the blown out by sunlight dog yapping at bottom center might be more of a mystery. I guess the camera didn't have highlight tone priority. The mother / daughter (?) energy is jovial, I love the colorful shirt -- but Dad, try to give Lassie a treat now and then so he won't bark so much, OK?