Second-placed Rushden came from behind to win a pulsating match against 10-man Hull.
The visitors made a terrible start when Damien Delaney put through his own goal under pressure from Stewart Wardley after just two minutes.
And it got worse when they had captain Justin Whittle sent off for bringing down Duane Darby 10 minutes before half-time.
But in the second-half Hull stunned their hosts by scoring twice within three minutes.
First on-loan Jon Otsemobor headed in from a Dean Keates' corner and then Jonathon Walters turned in Martin Reeves' corner to put the visitors ahead.
The home side equalised through Paul Hall and took the lead when Onandi Lowe fired home from Marcus Bignot's cross three minutes from time.
Wardley sealed the points in injury time.
Rushden & D'monds: Turley, Bignot, Edwards, Hunter, Underwood,
Hall, Wardley, Burgess, Bell, Lowe, Darby.
Subs: Peters, Gray,
Mills, Sambrook, Duffy.
Hull: Fettis, Otsemobor, Anderson, Whittle, Delaney, Reeves,
Keates, Appleby, Elliott, Forrester, Walters.
Musselwhite, Melton, Jevons, Regan.
Referee: E Evans (Manchester)