Former New England Revolution star Taylor Twellman and former WWE guy (and Harvard grad) Christopher Nowinski were at Suffolk University’s C. Walsh Theatre on Thursday night for a Ford Hall Forum about head injuries and athletics. They were joined by broadcaster Bob Lobel, who served as moderator. Nowinski was just at the Boston Film Festival screening his documentary, “Head Games,” which is also about brain injuries and sports. The movie, directed by Steve James of “Hoop Dreams” fame, is On Demand on Comcast and other providers.