It probably happens all the time. We just realize its astronomically low and assume the easier to understand, safer explanation in our own incompetence instead and go back to saying we never see that sort of thing.
"There are 10^11 stars in the galaxy. That used to be a huge number. But it's only a hundred billion. It's less than the national deficit! We used to call them astronomical numbers. Now we should call them economical numbers." - Richard Feynman