Why Do People Get 'Brain Freeze'?

Brain freeze happens when you eat something super cold too fast, like ice cream. It feels like a sharp pain in your head, almost like your brain is freezing! Imagine your mouth is like a little fridge and the cold thing you're eating is like a snowball. When it hits your mouth and throat really quick, it sends a message to your brain that makes it hurt, just like when you accidentally touch something hot.