A selection box of wondrous saves from Carlisle United goalkeeper Keiran Westwood and two late goals handed Brentford another away defeat.
Time after time the Carlisle stopper denied The Bees and the visitors even had what seemed a perfectly legitimate goal ruled out before strikes from Derek Holmes and Neale McDermott gave The Cumbrians all three points.
Westwood's first intervention came twenty minutes in when Charlie Ide let fly from 25 yards, the ball appeared to be arching over the goalie but he dived full length to keep it out.
From Simon Cox's resulting corner Calum Willock headed narrowly over and the Bees' striker forced another save from Westwood soon after.
The home side offered little early on, Kevin Gray headed wide from a deep corner and McDermott forced Clark Masters into a low save.
Westwood made an even better stop to tip an effort from Jo Kuffour over the bar, when it seemed certain to nestle in the top corner, and denied the same player soon after with a fine save to his left.
Ide should have broken the deadlock when he latched onto a short Gray pass and rounded Westwood but he slipped as he tried to turn the ball home with the goal unguarded.
And when Brentford did get the ball in the net referee Mr Webster and his assistant Mr Kettlewell denied them.
Cox drilled a free kick low across the face of the defence and it eluded everyone, nestling in the far corner.
The Bees' man ran away celebrating but was pulled back by the officials who deemed the goal should not count because a Brentford player, who had not touched the ball, was interfering with play.
The disallowed goal buoyed the home side, who went straight down the other end and took the lead.
McDermott's in swinging corner was met by a looping Holmes header and it bounced in off the far post.
Provider McDermott turned goal scorer five minutes later when Kevin Gall escaped down the right, his cross was controlled by McDermott, who scored with ease.
Holmes could have added a third when he looped a header over but it was Brentford, boosted by a vociferous travelling support, who finished the stronger.
Westwood tipped over a vicious Willock shot and when the Brentford striker met a Karleigh Osborne cross six yards out the goalkeeper still managed to dive full length to his right to deny him.
It meant Brentford headed back south with nothing to show from their efforts and sit bottom of the table at Christmas.
Carlisle United: Westwood; Raven, Gray, Murphy, Aranalde; McDermott, Billy (sub Joyce 66 mins), Lumsden; Hawley, Gall, Holmes
Subs (not used): Williams, Livesey, Arnison, Hindmarch
Bookings: Murphy (21 mins), Gray (49 mins)
Brentford: Masters; Osborne, Heywood, Griffiths, Frampton; Ide (sub Peters 64 mins), Mousinho, O'Connor, Kuffour; Willock, Cox (sub Moore 70 mins)
Subs (not used): Brown, Charles, Pinault
Attendance: 6,805 (180 Bees fans)
Written by Chris Wickham