John Lee Hooker - Boom boom

e|----------------------|---------------------| B|-----3----------------|---------------------| G|-/4----2--0-----------|-------------2-------| D|-------------2--0--2--|---2---------2---2---| A|----------------------|---2---------0---2---| E|----------------------|---0----3--------0---| The first bar of the tab is the main riff, followed by a quick E, G, A and then E (He does this twice). On the third time, he follows the riff with an A, C, D and then A (chords) instead of E, G, A and then E. On the fourth time, he follows the riff with an E, G, A and then E (chords) just like the first two times. On the fifth time, he follows the riff with a B, D, E and then B (power chords). B power chord is off the 2nd fret of the A string, D power chord is off the 5th fret of the A string, and E power chord is off the 7th fret of the A sting (instead of using the low E). The last time he does the riff he follows with the same chords he used to start (E, G, A and E). This entire sequence is repeated through the song, with a few alterations.