Rodrygo scored two goals in two minutes to take the game to extra-time.
The fans that were heading towards the tube station to go home were not allowed to return as soon as they heard the news.
A Madrid fan told a Spanish reporter that he left his seat two minutes before the 90th minute because he thought the team wouldn't qualify. I have been a season- ticket holder for 24 years.
I was told that in every door of the stadium you can't get back in. I don't see the signs in the doors. The best game of the season is missing. I will report it to the club.
As he left the stadium with his daughter, a Madrid fan was interviewed on Spanish TV.
The man was told by the reporter that Rodrygo had just scored the first goal of the game.
He said he didn't want his daughter to be upset.
The fan's face turned into a blank stare as he heard the crowd celebrating Rodrygo's second goal of the night.
He yelled "We've come back!" as he jumped for joy with his daughter. We have come back!
Benzema, who had been crucial in Madrid's comebacks against Paris Saint-Germain and Chelsea in the previous rounds, converted a penalty in extra-time to give Madrid a 3-1 win and a place in the final.