Hard to believe that in the 21st century NBA, a dunk would cause widespread anguish and consternation. We’re talking about a dunk, people. Monday night in Dallas, Warriors’ rookie sub Jordan Bell, on a breakaway with the Warriors winning easily, threw the ball off the backboard, grabbed it and dunked it. It created a poop storm around the NBA. On cleanup duty: Steve Kerr. The Warriors’ head coach talked about Dunkgate before Wednesday’s game against the Raptors. And he was happy to do so. It was one of about five topics upon which Professor Kerr discoursed in his pregamer, which provided a glimpse into the mind and heart of the coach. It was unremarkable — every coach talks before every game — yet subtly remarkable. For one thing, Kerr was there. You know what Woody Allen allegedly said: “Ninety percent of success is just showing up.” Kerr’s ongoing headache is still ongoing. He looked and sounded so upbeat, I thought maybe he’d had a breakthrough, or at least a break, a respite. I ran that by a couple people close to the team. Nope. Pain and assorted symptoms are still Kerr’s near-constant companion, and please don’t ask him how he’s feeling. So here is a man coping admirably with a messed-up situation with no end in sight. Life goes on, and Kerr has opted to go on with it.