There are some pretty masty voltages floating around inside a TV to trap the unwary person as well, but unless the case is damaged or removed, they're inaccessible.
As Ranger has said, outdoor appliances such as lawn mowers, hedge trimmers and so on are generally considered a higher risk electrically due to the risk of accidentally cutting the cord. Add to that the fact that these appliances are likely to be used in slightly damp conditions with the user standing firmly on the ground, and there's a greater risk of shock.
