My was Yngwies 3 str. sweep run part from a song called Demon Driver. The run is pretty cool and there are lots of different sweep shapes in that one. Never Day sweep part is nice too. 3 str. sweeps are pretty easy though. Chalange comes when it´s like 5 our 6 strings a la Jason Becker. Serrana is damn hard. I tried it once but hell no and besides I have only 22 frets.

Another cool Jason sweep run is the one from a song called Black Cat (Cacphany) Cool and possible. Sweep section from Jasons Opus Pocus is also one of few wich is possible to pull off.