David was in the ocean in Hawaii when the unthinkable happened—a shark attacked him and bit off his leg. “I don’t think you’re gonna make it,” a medic told the 25-year-old on the helicopter ride to the hospital. But David did make it, and soon he learned that surviving the shark wasn’t the hardest part—it was what came after. On this episode of How To!, we bring in Dr. Bessel van der Kolk, psychiatrist and author of The Body Keeps the Score, to help David understand and deal with the lasting psychological trauma of the attack. For anyone suffering from severe trauma, Bessel says, it’s okay to grieve the person you were before. Accepting the loss of the “old you” will allow you to better embrace who you are now, both in your mind and body.  Do you need help overcoming life’s many challenges? Send us a note at howto@slate.com or leave us a voicemail at 646-495-4001 and we might have you on the show. Slate Plus members get bonus segments and ad-free podcast feeds. Sign up now. Learn more about your ad choices. Visit megaphone.fm/adchoices