Humans, when sensing unpleasant things like sounds or sights or emotions, have a lot of coping mechanisms to try and force the brain to focus on something else by overwhelming the senses. When someone is embarrassed, or frustrated, or scared, or seeing or hearing something that is overwhelming them emotionally, they will often rub their head or hold their face or bounce around or making random noises. These are all an attempt to overwhelm the brain with nonsense information to try and overpower the unpleasant sensory information, hoping that it will become less noticeable or “lost in the noise”, so to speak.
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