Sory Kaba's stunning overhead strike sealed a vital win for Cardiff City in their Championship survival fight.
Cardiff came from behind at Vicarage Road after Ismaila Sarr scored his 11th of the season for an early Watford lead.
Kion Etete and Cedric Kipre both scored in the space of three minutes before a Kaba's acrobatics before half-time.
The result saw Cardiff climb two places clear of the relegation zone and put a major dent in Watford's play-off hopes.
That both teams are on their third manager of the season speaks volumes for the instability of these clubs.