The physics flex nobody asked for! First we have Planck's constant (ℏ), the rockstar of quantum mechanics that lets particles live their best wave-particle duality lives. Then comes the sequel nobody needed—the Boltzmann constant (kB) in reduced form, which is basically the universe saying "I can make things even smaller!"
It's like showing up to a party with not just one obscure physics constant, but TWO of them divided by 2π. The practical applications? Absolutely none for your daily life. The nerd credibility? Off the charts. This is what physicists do instead of getting normal hobbies.