Inspired by the presence of former star pupil and England scrum-half elect, Shaun Perry, Dudley King-swinford came back from 16-7 down to inflict Peterborough's first loss of the season in Midlands One.
With Perry, given the weekend off by national head coach Andy Robinson and his employers Bristol, watching from the sidelines DK edged a thrilling encounter 19-16 thanks to an injury time penalty from Ben Rimene. They had to do it the hard way though as they slipped behind 11-0 before Rimene converted Pete Knight's pushover.
The fly half narrowed the deficit to a point with a penalty before Ben Chan crossed to give the visitors a 16-10 interval lead.
But Rimene levelled with two more kicks within ten minutes of the restart and then Peterborough had Barry Hodges red carded for illegal use of the boot.
However, the hosts gained very little advantage from their numerical supremacy as the game drifted into uncontested scrums.
Two minutes into injury time Rimene stepped up and sealed his side's third win of the season.
Walsall were unable to halt the Luton steamroller with just Andy Banks' try to show for a 32-5 mauling at home by the runaway leaders.
Broadstreet, though, kept up with the midtable sides  six of whom are covered by a single point - when they eased past Luctonians 33-10. First-half tries from Eddie Simkiss and Chris Brown set them on their way.
Ben Shepherd repeated the trick in the second period and Danny Richards kicked 18 points.
There were also victories for Bedford Athletic, Dunstablians - 32-31 over South Leicester - and Scunthorpe though bigspenders Luton have already opened up a three point lead at the top.
After being losing their leadership of Midlands Two West in losing to
Solihull last week, Kenil-worth were upset once more as the were downed 17-13 at home to Burton. The visitors claimed top spot in the process.
Camp Hill are still looking for their first win after a 21-13 defeat at home to rejuvenated Bromsgrove. n World Cup-winning coach Sir Clive Woodward is urging successor Andy Robinson to buck the system if he is to retain the trophy.
Woodward expressed concern over new director of elite rugby Rob Andrew's potential involvement with team affairs and the ongoing club versus country row, and warned Robinson he would have to become a "control freak" to stand a chance of glory next year.
Woodward said: "All I do know is we did it one way, which was by long-term planning and preparation.
"They can still win it because they have the players  they definitely have the players.
"Whether they have got the system in place, that is the question mark, but they can win it."