Why Shouldn't I Save 5 Chars As An Int?

That moment when you're optimizing memory usage and think "You know what? A char is 8 bits but I only need to store 5 characters... I could totally squeeze that into a 32-bit integer." Then you spend 6 hours bit-shifting and masking when you could've just used an array and gone home early. But hey, you saved 3 whole bytes! Practically a hero of computer science.