The Newcastle United goalkeeper kept out former Magpies captain Yohan Cabaye from the spot on Saturday.
Newcastle United goalkeeper Karl Darlow has told NUTV, as quoted by Sky Sports, that he hopes his penalty save against Crystal Palace on Saturday will turn out to be one of the pivotal moments in the club securing survival.
The Magpies stopper, who was propelled into first-team action after Rob Elliot suffered a season-ending injury in March, denied former captain Yohan Cabaye from the spot with just 20 minutes remaining to preserve a priceless 1-0 victory for his side.
That victory means Rafael Benitez's side have won eight points from their last four games and lifted the North East club out of the relegation zone with just two matches remaining.
Darlow, who has been a consistent presence between the posts in the last few weeks, admitted that he hopes he will be able to look back on his save as one of the key moments in Newcastle ensuring survival.
The former Nottingham Forest man told NUTV, as quoted by Sky Sports: "Hopefully it will be [the best moment of my career]. If it saves us from relegation, then of course it's going to be a big moment for this club.
"I just hope it can prove to be a moment that will be remembered and hopefully we can get out of this mess that we have got ourselves into.
"I was just preparing because I thought he'd given a free-kick to the defending team, so I was waiting to take that. Then I saw him point at the penalty spot and everyone was a bit bemused."
Newcastle's survival would be a remarkable achievement for Benitez, with the Spaniard having taken over a club in disarray when he replaced Steve McClaren earlier this year.
After their crucial victory, the Magpies are a point clear of rivals Sunderland with just two games to play, although the Black Cats and Norwich City both have a game in hand.