The Championship's top scorer Ivan Toney held his nerve to score from the spot and earn 10-man Brentford a draw at fellow promotion hopefuls Watford.
A frantic five second-half minutes at Vicarage Road saw Brentford's Ethan Pinnock sent off for bundling over Ismaila Sarr in the box and Troy Deeney drill home the resulting penalty, before Toney sent Ben Foster the wrong way after Christian Kabasele was penalised for handball.
Vladimir Ivic's hosts thought they had won it when sub Stipe Perica headed in a Sarr cross but it was disallowed for offside despite the Croatian striker appearing to be level with the last defender.