Try to say this one five times fast.

Researchers at MIT have found that the phrase "pad kid poured curd pulled cold" is one if the most impossible phrases to say without getting your tongue tied.

When a test group was asked to say "pad kid poured curd pulled cold" ten times fast, they couldn't make it very far without clamming up.

The phrase may not make a lot of sense but it took a meeting of the minds in San Francisco to come up with it.