This clip of Christopher Reeve transforming from Clark Kent into Superman is an amazing example of Alexander Technique and non-doing. Seriously, watch it.
He doesn't haul himself up, he floats up to his full height effortlessly.
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— Michael Ashcroft (@m_ashcroft) February 4, 2020
Yes, great acting. Christopher Reeve is the only one who has ever shown how a pair of dorky glasses could work as a disguise — because it’s not about the glasses. Those are just a prop for Superman’s/Clark Kent’s own benefit, to remind him who he is (or is not) when the glasses are on.
The actual disguise is every single thing about him is completely different when he’s Clark Kent. The glasses are merely an affordance for easily inhabiting that character.