Spotting a concussion can be tricky. After a potential head injury, you can ask if the person feels dizzy or has a headache—but that relies on self-reporting, which isn't always accurate.

Editor's Note: While we can't endorse what X has become, we can bring you the fun moments that still exist there, curated and free of the surrounding chaos. Well, folks, I can't say I'm surprised — ...

Rebecca Schaeffer, who had recently starred in the CBS sitcom My Sister Sam and was allegedly in the running for the lead in ...