The Champions League's all-time leading scorer registered an 11-minute hat-trick and all four in a 19-minute spell either side of half-time.
The total goals scored by the Portuguese in hat-tricks now surpasses that of his Brazilian namesake, who played for Madrid between 2002 and 2007 (h/t Mike Dalby on Twitter).
Cristiano Ronaldo has now scored 110 times in games where he's scored three or more goals, bettering the 104 scored by the Brazilian Ronaldo in his five years with Los Blancos.
The latter made 177 appearances for Real Madrid, winning two league titles, the Spanish Super Cup and Intercontinental Cup.
The records keep tumbling for Cristiano Ronaldo, who has now scored 10 or more goals in each of the last five Champions League campaigns, and his 11 in group play this term is a competition record.
He's scored more goals in Europe this year than 23 of the other 31 competing clubs.
What does he make of it all?
"I don't seek out records, records seek me out," he told Spanish TV station Mega (h/t ESPN FC).