Not so much the school bus as the lack thereof.

So I grew up in the South and one winter day in kindergarten we get two or three inches of snow. My dad was unemployed at the time, and the bus stop was close enough to the house that he could see me through the living room window, so he just sent me out like on a normal day. I should point out that my dad grew up in Syracuse, New York, which is one of the snowiest cities in the US. So I'm waiting and it feels like it's been a while but I didn't have a watch and finally my dad comes out and gets me and says, "Okay, I don't know what's up, but I'm taking you to school." We drive to school and it's so empty it's eerie. The doors are shut, no buses, no kids, no cars and five-year-old me is thinking everyone got abducted by aliens or something. There's this old black janitor, only guy around, so my dad asks him what's going on. This guy goes, "Oh, didn't you hear? They canceled school because of the snow." My dad (again, from one of the snowiest cities in America) looks at the three inches and goes "They canceled school for this?"

And that's how I learned snow days exist.