Watch the Mark Knopfler online guitar lesson by Jeff McErlain from Kings of Tone
On this solo I put in a banjo roll, this technique is common place for country guitarists. It can also be done with pick and fingers and is really useful. This is clearly the Chet Atkins influence in his playing. If you are not familiar with Chet Atkins (please tell me you are!) you must check him out immediately. Known as Mr. Guitar he is one of the great innovators of the instrument. I especially love his version of "Mr.Sandman". Also check out TrueFire's own Jim Dalton's Big Twang course for more on banjo rolls.