Brentford scored two objectives in the last 10 minutes to fight against imminent loss and deny Watford triumph.
Bryan Mbeumo opened in a stoppage-time penalty to make it 2-1, minutes after captain Pontus Jansson had leveled with a header at the back post.
Watford drove for an hour because of Emmanuel Dennis’ first-half header yet a late flood from Brentford was at last compensated.
Rout implies Watford stay only three points over the relegation zone.
Dennis, who has been straightforwardly associated with nine of Watford’s last 12 Premier League goals, was left plain as he gestured in the opener contrary to the rules in the principal half.
Brentford had controlled the initial 20 minutes, approaching through Shandon Baptiste and Mbeumo however Watford goalkeeper Daniel Bachmann made a few shrewd recoveries.
Joshua King’s twisting exertion then, at that point, struck the post, providing Watford with their first corner of the match, and Dennis changed over.
Watford looked set to take every one of the three points home as well yet Brentford burst into life late on when Jansson got on the end of a twisting cross to gesture in the equalizer.
Brentford heaped on the strain as the game dove deep into stoppage time and substitute Saman Ghoddos was brought somewhere near William Ekong to set-up an emotional finale.
Mbeumo kept his cool to send goalkeeper Bachmann the wrong way and the success, which started happy scenes at the Brentford people group Stadium, moved the Bees up to 10th in the table for something like an evening.
With only six focuses isolating fourteenth and twentieth in the table, there could be a piece to keep away from transfer this season.
The bottom three on the table are currently occupied by Norwich, Newcastle and Burnley – yet Sean Dyche’s side have two games close by and will go above seventeenth set Watford assuming that they win both.