Week 3, Pittsburgh lost to Philadelphia 34-3.
The Steelers were done. Until Week 4, when they beat Kansas City 43-14.
The Chiefs were done. Until their next game, when they won at Oakland, 26-10.
The Raiders were done. Until their next game, when they beat Jacksonville 33-16 for their first 4-0 start on the road since 2000.
"I think we'd all like to play at the same level each and every week," said Vikings safety Harrison Smith.
But …
Unfortunately, that whole human-beings-aren't-perfect thing ultimately gets in the way. At least it has for every team in NFL history except the 1972 Dolphins.
But there's another part of human nature that many fans underestimate during the handful of days pouting between a beatdown and their favorite team's next stroll to the plate. Unless it's Cleveland-weak, that favorite team tends to bring a bigger, angrier, more determined bat to the next three-hour scrum.