Watch the Train Whistle (& Then Some) online guitar lesson by TrueFire from Play Acoustic Guitar 6: Lick Lexicon
Train Whistle (& Then Some) - E Lick 4 is a video guitar lesson presented by David Hamburger and is sourced from Fingerstyle Blues Factory.
You gotta love the train whistle lick. If you've ever heard people going on about quarter-tone bends or, even more exotically, "microtonality," this is all it is - bending to a note that's somewhere in between two adjacent frets, and is therefore less than a half-step from its starting point. You know the sound, because you've heard it countless times in the blues: the bends we're doing from the 8th fret of the second string are the sound of a note that's reaching for, but not quite getting to, the full sweetness of a major third. There's some great train whistle action on Roy Book Binder's arrangement of "Friend Like Me,' and Dave Van Ronk's "Nobody Knows The Way I Feel This Morning" makes use of a similar kind of quarter-tone bend, without the double-stop.