Popular music, jazz, and rock have another thing in common that classical music does not have. That is the concept of the "solo." I use quotation marks because I think it is a misnomer -- often the other instruments still play a supportive role during a solo. Sure, classical music has its concertos and cadenzas and you may think that is the ultimate form of soloing, but there is a vast qualitative difference between the intent of a concerto and a rock guitar solo, as there is usually not a whole lot of wiggle room in classical music for improvisation.
Lately in pop music soloing has become less fashionable, but there are still some great jam bands out there. Also I think there is some interest in retro styles that promote soloing as an art form once again.
So I'd like to hear your picks of some of the most moving, shredding, or memorable recorded solos of all time, whether they are guitar solos, drum solos, keyboard solos, flute solos, kazoo solos, or whatever, in any genre.
I have a list of favorites I will post later. Some are a bit obscure, so I would like to track down samples first.