Very surprised you don’t know? Yes, 1994 Hautacam stage Indurain rode off the front from everyone including Marco Pantani and his big rival Tony Rominger. It doesn’t get any more emphatic than that.
Another example was 1993 TdF stage 10 to Serre Chevalier - riders like Bugno and Chiappucci were destroyed by minutes on the Galibier. Only Rominger and Colombian pure climber Alvaro Mejia hung with Indurain.
It was actually amusing back then reading or hearing all these claims it was impossible for Indurain to beat little climbers in the big mountains. Then Big Mig made fools of them all with his sheer power.
I am too young to have watched it live and have never gotten around to watching videos of those Tours as I've been told how boring they were because he never won a mountain stage during his reign and always won the Tours through emphatic TTs.
And still I wouldn't really expect to get a Kwaremont feeling from watching it...