The worst part was, la Real manager Jagoba Arrasate knew it was coming, but was helpless to do anything about it.
"In attack, they are unstoppable," he said in the build up to his side's trip to the Spanish capital. "And that's something which they have demonstrated not just once or twice but on many occasions.
Difficult to stop?
Try impossible for the Basque side, who were taken apart in the afternoon sun in Madrid.
They led within 13 minutes, when Benzema was the creator and Ronaldo the benefactor.
If the French forward's touch and cross were perfect, his Portuguese colleague's touch and finish were just as impressive.
Five minutes later the roles were reversed.
Ronaldo found space down the left, before cutting back for Benzema to double los Blancos' lead in the 18th minute.
Soon came Madrid's No.7's 23rd goal of the season. Again causing problems down the left, his cross was handled in the area by Markel Bergara. Ronaldo stroked the penalty down the middle.
Just before half-time Bale got involved, the Welshman setting up Sami Khedira for his first goal of the season.
And after Antoine Griezmann had pulled one back for the visitors—his seventh goal in five league games—Ronaldo completed the scoring with a free kick.
It completed his 23rd hat-trick in Madrid colours, and was his 24th goal of the campaign.
There could have been more too: Bale wasted a couple of chances, Ronaldo hit the bar and Benzema dragged a shot wide shortly before he was taken off.
The three were first paired together, slightly controversially, for the Clasico. Thought they did not immediately gel, the results in the following four games have been breathtaking.
Ronaldo has scored nine goals in that run, Benzema four and Bale three.
Meanwhile Bale has assisted five, Benzema four and Ronaldo two. Is there a better front three in Europe at the moment?
Lionel Messi returned to form in the Champions League in midweek, Alexis Sanchez is on a goal-laden run and Neymar has adapted to Europe, but their form is nowhere near as explosive Madrid's trio.
In Germany, Pep Guardiola's Bayern Munich are hardly trading in goals, despite producing results.
Borussia Dortmund's Robert Lewandowski, Marco Reus and Pierre-Emerick Aubameyang have scored 26 between them though, but were unable to break down Arsenal on Wednesday—although the latter made only a fleeting appearance off the bench.
The scary thing for the rest of Europe is that, due to Bale's injury problems, it is still early days for this trio.
They've set the bar at a phenomenal height—can they continue in this manner?
If Real Madrid are going to continue to look a bit wobbly defensively, they might need to.