Houston Tumlin was an actor known for playing Walker Bobby, the son of Will Ferrell’s character, in “Talladega Nights: The Ballad of Ricky Bobby.”If someone you know exhibits warning signs of suicide, he or she should not be left alone. Call the U.S. National Suicide Prevention Lifeline at 800-273-8255. The Lifeline provides free, confidential support for people in crisis or emotional distress, 24/7 year-round.