What are your favorite oxymorons?

The oxymoron we like best is from the Peanuts comic strip when Charlie Brown often said, “good grief.”

Here are a few more oxymorons we like - in no special order:

virtual reality
almost exactly
old news
mutually exclusive
blind eye
ill health
blurry vision
awfully pretty
terribly pleased
constant variable
deafening silence
modern history
act natural