And now, we have the big riff that we were building up to in Exercise 3. Make sure you headbang when you play this one. It will make you play better!...
...Okay maybe not. :)
Similar to Exercise 3, the effectiveness of this riff relies heavily on the accuracy of the rests between the flurry of notes. Practice this riff very slowly. If you can't get the rests tight when playing slowly, it'll be impossible to get them sounding right when playing fast. So make sure you build your way up in speed only when you're ready.
See you in Exercise 5!