Listen in as Sarah explains the causes and consequences of brain injury, which can be particularly bad for children and older adults. She shares her knowledge about what to look for immediately and in the days afterward, and what to do to heal as fast and as well as possible. After listening to Sarah, you’ll be armed with the critical information we all need for quickly assessing and helping friends make good decisions in the immediate aftermath of a crash. Are they okay to get back on the bike? Should they go to the ER? Should you call 911?