Watch the Blueski online guitar lesson by Jeff McErlain from 30 Smokin' Blues-Rock Guitar Licks You MUST Know
This is another tough lick at first, but like many licks, once you get the idea it becomes much easier to play. It has a certain feel to it that kinda takes over that's really fun. This is similar to something Van Halen might do with that triplet swing feel and a blues scale.
If you pay attention, you can hear that it's a repeated descending melodic pattern using an Em blues scale. The real trick to getting this one together is working through the hammer-ons and pull-offs which make the lick possible at this tempo. But more importantly, the hammer-ons and pull-offs also give the lick its fluid sound.