Flashback Friday: On the purpose of saying "ow" when you hurt yourself.

If you bite your tongue or stub your toe, your first instinct is probably to yell. But have you ever wondered why that is? According to this study, being vocal could actually help you tolerate the pain. Here, the authors tested how long subjects could keep their hands immersed in very cold water before they couldn't take it anymore. The researchers found that saying "ow" during the experiment increased the subjects' tolerance for pain, but hearing a recording of their own voice or someone el