The mall stores are an unusual feat for a new business.

In performance he usually accompanied entirely from memory, considered an unusual feat for an accompanist.

He slept all through the night, an unusual feat for a man of his age.

Here are 10 of the most amazing and unusual feats ever performed by a person's brain.

Making such a stellar comeback after taking a long break was an unusual feat for a middle-aged actress.

Another unusual feat was to pull a hoverbarge on snow, ice and water in 1982.

He is still the only person to achieve this most unusual feat.

According to historians, the unusual feat set by Pipgras is a case unique in major league history.

A strange power permitted him to perform unusual feats in mathematics.

The agency did the commercial in-house without the customary outside producer and director - an unusual feat.