Character has e=mc² written in their clothes

>character has e=mc² written in their clothes
What are some other examples of subtle details in anime that most people won't catch/understand?

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This is getting out of the rails

bump

a thread had die for this

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>most people won't catch/understand
Why not?

Because you have to have a high IQ to understand doctor stone

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Wow he got some random letters written, so what?

I study chemical engineering and it felt really good when I got that E=mc^2 reference. Finally years of studying and understanding of quantum mechanics paid off.

Because according to OP, most people don't know who Einstein is.