After Fives went "crazy" and trapped Rex, Anakin and you, a Republic Commando, in a Rayshield, this happened

Fives:"YOU DON'T BELIEVE ME! THE CHANCELLOR, THE CHIPS-"

Fives is cut off by Commander Fox shooting him

Rex:"No! Stay with me, stay with me!"

Fives:"Forget the mission...oh nightmare..."

Anakin:"You could have stunned him!"

Fox:"Orders. I execute orders."