A Philadelphia assault trial over a fight that cost a man his left eye has ended in a mistrial after his prosthetic eye popped out as he was testifying.

The Philadelphia Inquirer says John Huttick was weeping on the witness stand Wednesday as he testified about the impact of losing his eye in the August 2011 fight in the parking lot of a bar called the New Princeton Tavern.

The $3,000 prosthetic blue eye suddenly popped out. Huttick caught it and cried out as two jurors gasped and started to rise.

Judge Robert Coleman granted a mistrial motion by defense attorney Eileen Hurley.

Huttick says he can't believe the eye "just came out."

The judge calls it an "unfortunate, unforeseen incident." He has scheduled a new trial next month.