Athletic Bilbao striker Aritz Aduriz became the first player to score five goals in a Europa League game as the Spaniards thrashed Genk 5-3.
The 35-year-old Spaniard scored a hat-trick of penalties and is the first Spaniard to score five goals in a single European game since 1971.
Fabrizio Ravanelli was the last player to score five goals in a second-tier European game - hitting that mark for Juventus in a Uefa Cup match against CSKA Sofia in 1994.
Who made it through?
After 24 matches and 77 goals on Thursday night, Zenit St Petersburg, Shakhtar Donetsk, Schalke and Ajax booked their place in the knock-out stages.
Zenit only needed a draw but beat Irish champions Dundalk 2-1 to progress with two games still to play.
Shakhtar had not conceded a goal in the competition but were behind after just 19 seconds against Gent before coming back to win 5-3 on the night.
In Germany, Schalke scored two first-half goals to beat Russian side Krasnodar 2-0 and seal their place in the last 32.
Ajax also made it through after holding off a late fight-back to beat Celta Vigo 3-2.
Late goals and reds galore
Anderlecht thumped Mainz 6-1 in Belgium, scoring three of their goals between the 89th and 94th minutes.
There were also six goals as Roma beat Austria Vienna 4-2 with former Manchester City striker Edin Dzeko scoring twice.
Five players saw red on Thursday, including a rapid dismissal for Feyenoord defender Eric Fernando Botteghin.
The Brazilian was booked for a foul in the 42nd minute and then received a second yellow for handball less than 60 seconds later.