Chesterfield's run of six league games without letting in a goal was shattered in some style by Bristol City.
Two of their four goals came from set-pieces before Scott Murray ran in two goals in added on time.
Christian Roberts and Matt Hill put City well on top and Chesterfield finished a well beaten and tired side after their Worthington Cup exploits against West Ham.
Defeat away to City came as no surprise to Chesterfield for they have been trying to win there for 101 years.
They were more offended by the way they went down surrendering a long line of clean sheets and crashing as they tired before City's non-stop attacks.
On this day City outplayed a side who could not match the sterling effort they put in against West Ham in the Worthington Cup in midweek.
They had not let in a league goal since the end of August, a record which so nearly came to an end in the second minute when, following the first of their ten corners, Hill send a header from Murray's cross against the bar.
The visitors' keeper Carl Muggleton then dived low to his right to deny Roberts but Chesterfield were finding it hard to clear their lines and that proud record finally went after 607 minutes.
Peter Beadle threaded a pass forward to Roberts and his partner notched a rather lucky goal as the shot hit a post and the keeper's hand on its way into the net.
City were so much on top that Chesterfield didn't get a look at the home goal for the first half hour. Then David Reeves sped in with a good shot from the right but Steve Phillips had it well covered.
City went on piling up the goal attempts and Chesterfield needed the break to reorganise. Midfielder Gareth Davies who had been nursing a hamstring was replaced by Rob Edwards who gave Chesterfield a zest for the game.
City were knocking the ball around their wide pitch with every confidence as Murray and Mickey Bell caused problem after problem with their speed on the flanks.
Effectively the game went beyond Chesterfield with another set-piece goal when Hill was allowed to run past defenders to get in a powerful header for the second goal.
City were putting in their best football of the season passing with enthusiasm and accuracy and those two late goals from Murray, who now has eight this season, rubbed in the victory.
It was quietly hailed by their manager Danny Wilson while Chesterfield's boss David Rushbury conceded: "This was a result to bring us down to earth. They kept us on the back foot and rather carved us up."