Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Worst concert ever!!!

Slade Craven was definitely not on his game for his farewell concert. One of his strong points has always been his "stick-to-itivism" and single-minded, determined work ethics.Imagine my chagrin as he walked off after a half hearted attempt at one song (albeit a great, great ?^in' tune!).All that aside, Slade's gumption really ended up coming through in saving many lives by safely landing a very complex aircraft and averted an evil metaphysical event in Kansas.Slade dropped off the radar(no pun intended) after this heroic feat, and I have heard rumors from fellow Slade fans that he has changed his appearance so that he looks more like his high school yearbook photo, and is now persuing the "sensitive singer/songwriter" school of music.Any leads, anyone?