Flemming struck from the spot on 85 minutes to draw the visitors level, but two goals conceded before fulltime saw Burnley defeated 3-1 on Saturday.
Flemming said afterwards: “It's very disappointing in the end, coming away with zero points. Brentford are a good side, I think everyone in the country is aware of that.
"They've given us a tough game; I think we showed real good resistance for large parts of the game. The second half maybe a little bit less, defensive resistance was ok, but offensively in the second half I think we probably wanted to do more and be more of a threat.
“Away from home in the Premier League, sometimes that is what it is. Obviously, we want to stay in a game, look the door, and get at least a point and go from there. Then we concede, equalise, then it's the same thing, ok we’ve overcome this setback and now we really have to get it over the line. But then I don’t know, within how ever many seconds it’s in the back of the net so there was a little bit of disbelief there.”
He also said, "In in this league if you switch off for any second or any minute really whatever point in the game it is, there's a very high chance that you get punished.
"But it's harder to accept it after you've just scored because you've got this little moment of celebration, you get together, you set off for the kick-off, and we've got the time to organise and be even extra aware and extra focused on making sure that they don't get back in the game, and maybe that actually we can build some momentum off the back of it. But somehow, we fell short there, which is really frustrating.”