LOL. As a parent of a goalkeeper let me explain...you sit there as a parent cheering your child for making an incredible save that involved them putting their face in front of kicking feet while scared to death they will soon have to replace teeth, and/or get a concussion, and/or a permanent scar on their face or worse. You know the ball that went in the goal was from the mistake that the defender left the back bar at the last second on a corner kick yet it is highly unlikely any other parent knows what happened. You know every technical aspect of the position from sitting at hours of trainings for years so you know what was just a good ball in the goal, what just requires more experience, or you know your kid made a mistake while other people that don't understand the position think every goal in is a goalkeeper mistake. You can tell by your kid's body language they are beating themselves up for it and all you want to do is yell that you are human and young, mistakes are part of learning, and if you keep focusing on the one that got past you are going to miss the next one. You also want to yell at that ignorant coach that fails to recognize the position requires mental grit like no other position so saying stupid shit prior to a penalty kick or after a mistake while in a game is best done at practice .....yet you can't do any of that for obvious reasons.
Over the years I have become calmer mostly because I stopped drinking caffeine before games and my daughter finally has a coach that gets it mostly because he was a goalkeeper. None the less I kick the imaginary ball while sitting in my chair, coach my daughter to myself (yes I talk to myself), and try to film her only to get videos of the grass at my feet. Fortunately I have some mental blackout when she is pummeled by the other team so by the time I am able to process what has occurred, it is too late to yell at anyone.
Most importantly....it takes a nut job to love the position enough to sacrifice themselves to the level they do so it would stand to reason their parents are most likely nut jobs as well!