@the_twin_doctors: Two men appear to get KNOCKED OUT in this 49ers-Raiders brawl. 😳 This happened outside Levi’s Stadium in Santa Clara. Getting knocked unconscious after a blow to the head is a medical red flag. Even after waking up, concussion or a brain bleed can still be present. Would you know what to do if someone dropped like this? #49ers #Raiders #Concussion #HeadInjury #MedTok