Pracovní - programátoři a výměna žárovky
Q: How many programmers does it take to change a light bulb? A: It cannot be done. It is a hardware problem.
Kolik programatoru je treba k vymene zarovky? Zadny, je to hardwarovy problem.

until hell freezes over: forever. "Chris can practice the piano until hell freezes over, but he'll never play well because he's tone-deaf." Note: This expression is used to describe something that will not change, no matter how long or how often it's done.