Yeah, the Broncos were running exotic blitzes. Overloads to one side, delayed blitzes, sending safeties, sending 7 vs. 6 blockers. Not typically things teams do in the first preseason game. Of course, the Broncos are a team that has a lot of continuity. They have guys that have been running the same system for a few years now. It makes sense that they would see how (especially the new guys) play in a system they will actually run. The Bears clearly weren't prepared to play a team with an actual gameplan. But that's their own fault. And even if they were, they still were atrocious blocking anyone which is not acceptable.