Personally I'd like to know exactly how Bert became evil. Was he evicted from Sesame Street? Did Bert date some lady and found her in bed with Ernie one day, and that sent him over the edge? Did Snuffy sit on his favorite pigeon one day and that caused him to go over to the Dark Side? Did Barney and that purple teletubbie give him some purple haze? Did he have to wait on a long line just to get some paper clips, and when he finally got to the front of the line, all the paper clips were gone? WDF caused Bert to turn Evil?