I just remembered a fun story about throwing hard. Early in my son's high school career, he would sit around 75 with his fastball. We went to an amusement park shortly after a particular season ended, and he went to the "guess my speed" game. He claimed he was going to hit 80. Got his shoulder loose, stepped in, grunted, and let her rip.
That gun read 56. We walked away losers.