Mine is from an excellent kid's cartoon - Histeria, which made fun of history while teaching it (albeit in a cursory manner). It had a skit about Alexander the Great and his father. Alexander would keep on doing impressive things that his father would dismiss as "pretty good."

Alexander (while surfing on a chariot pulled by lions): Hey dad! Check this out!
Dad: Pretty good, son. Not great; but pretty good.

I found it funny, and I'm certainly not great...