Undefined Memes

That moment when you innocently order Nan bread and trigger a programmer's existential crisis. In JavaScript and many other languages, NaN stands for "Not a Number" - it's literally impossible to serve. The waiter's face is the universal debug expression we all make when someone asks us to handle undefined behavior. Just another day of type errors spilling into the real world.

Ah, JavaScript's type coercion explained with toilet paper. Pure genius. Non-zero value: Has toilet paper. Works as expected. 0: Empty roll but still there. Technically exists but utterly useless. null: Just the holder. Someone deliberately removed the toilet paper. undefined: No toilet paper holder at all. Whoever built this bathroom forgot a critical component. And yet somehow all of these evaluate to false in an if statement. JavaScript, where the rules are made up and the types don't matter.