​CHICAGO — Asked for his initial reaction, a front-office official for another team didn’t hesitate after watching the Chicago Bears offense in the season opener.“That was some ‘Greatest Show on Turf’ (stuff) right there,” he responded.It was an off-the-cuff comparison for Ben Johnson’s offense — which scored the second-most Week 1 points in NFL history in a 59-37 victory over the Carolina Panthers — based more on how explosive the performance was than on X’s and O’s. The Bears scored eight touchdowns — six rushing and two passing — and almost nothing the Panthers tried slowed them.The Bears offense has been one of the biggest stories around the league entering Week 2, when Johnson will be pitted against uber-aggressive Minnesota Vikings defensive coordinator Brian Flores in Sunday’s home opener at Soldier Field.With ascending quarterback Caleb Williams looking more accurate — his 22-yard touchdown pass to well-covered tight end Cole Kmet was threaded into a small window — and more decisive as a runner, the Bears could be at the forefront of NFL offenses for the first time since the 1940s, when they moved the needle with the T-formation.Interestingly, Johnson spent a couple of hours talking ball with Mike Martz via Zoom back in the spring. They were originally introduced when Johnson was an assistant on Adam Gase’s Miami Dolphins coaching staff.“Mike is phenomenal,” Johnson said. “I feel like we have a shared philosophy in how we want to attack.”Johnson has described his scheme as a “mutt,” generated with ideas from many systems, including deep passing concepts and presnap motion from “Air Coryell” and more timing-based concepts consistent with West Coast offenses. There’s a heavy emphasis on a physical running game, and he’s always seeking to attack by gaining advantages through spacing and numbers.Martz, of course, was the Bears’ offensive coordinator in 2010, the last time they reached the NFC championship game. But he’s best-known and still revered as the innovator of the St. Louis Rams’ “Greatest Show on Turf” that revolutionized offenses beginning in 1999.By evolving a scheme originally created by Hall of Fame coach Don Coryell at San Diego State in the 1960s, Martz turned the Rams, a team overflowing with offensive talent, into a juggernaut. They led the league in points, total yards, passing yards and rushing yards per attempt over a three-year span through 2001 that changed the way defenses had to play.Johnson is more committed to running the ball than Martz was, but one thing often lost in the gaudy Rams statistics is that when they did run, they ran well.Consider Johnson and Martz members of the mutual admiration society. Martz enjoys that Johnson doesn’t coach scared, a trap some NFL coaches fall into.That goes way beyond made-for-social-media moments like ripping off his shirt postgame in the locker room. It’s how he challenges players to improve and is relentless in at