DETROIT — A bad decision from Caleb Williams soared through the air, overshooting his intended receiver, and landed right in the hands of Detroit Lions safety Kerby Joseph.

With a frustrated Ben Johnson looking on, Joseph gathered the defense in Detroit’s end zone to celebrate with a play the Chicago Bears coach remembers well: Stumblebum, a trick play that Johnson used to smush the Bears at Soldier Field last season — when he was still the offensive coordinator in Detroit — a play that seemed symbolic of the creativity and attention to detail that Johnson would bring to Halas Hall.

But on Sunday, it was once again used as a tool of mockery against a franchise that doesn’t look any closer to figuring things out than they did before Johnson arrived in January.

After a week of nervous

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