Apple Pi With Mustard

I woke up this morning
Thinking pi equalled three;
Crooked birds flew through
My window, sang out of key.

Walked ceilings for hours,
Cause it's more fun that way;
Then misshapen sun
Heralds ending of day.

I stand up to sleep,
I sneeze, and I sigh;
It's a messed up world
When three equals pi.