The father was playing with his 14-year-old son by raising his seat up in the air while they were on the seesaw. The son asked him to let him down after getting a little scared. He then followed suit by slumping down on his side, but since he weighed about 100 pounds more than his father, this caused his father to flip off the handlebar and smack his shoulder. Unfortunately, the father ended up with a broken collarbone.
