A bus carrying the sages of helem breaks down

The driver steps down and begins to try and fix the engine. He swears, cusses and vows to forever pray, but the bus wont budge.

Suddenly one of the sages steps down and says

"sir, excuse me, but i think i know whats broken!"

The driver, having no patience, tells the sage to get back on the bus. He continues to work in the blistering heat, but still the engine wont move a inch. The sage steps down again and says

"sir, if youll just let me, i can tell you whats broken!"

The driver tells him to get his ass back on the bus, and resumes work. He starts to lose every shred of sanity he has, kicking the engine and swearing at the gods, but to no avail. the sage hesitatingly steps down once more

"sir, I really can tell you whats broken!"

"WELL? WHAT IS IT?"

the sage brightens up and exclaims

"The bus!"