It was a first competitive goal for the £7million summer arrival from Chivas, who has made such a positive impact in his early days at Old Trafford.
And, while Dimitar Berbatov and Michael Owen have grabbed the goalscoring headlines so far this season, Ferguson never felt Hernandez would have a problem finding the net either.
"The form of Berbatov has delayed his appearances," explained Ferguson.
"Of course, Wayne Rooney and Dimitar were the natural choices at the start of the season, which has meant Javier has not had a lot of football.
"But he is young and he is developing his game and doing good work in the gymnasium.
"He still has work to do in that aspect of his physique but you cannot take away from the fact that he is a fantastic finisher.
"The way he took his chance, it was like shelling peas. It was so natural to him."