Dream Theater guitarist John Petrucci has long been admired by the guitar-playing community for his almost unearthly technique. Petrucci is not only respected for his technical prowess however he has been voted "Best Guitarist" in Guitar Magazine and "Break Through Guitarist of the Year" in Guitar for the Practicing Musician. Such remarkable accomplishments made Petrucci a logical choice to host the Warner Brothers instructional video release "Rock Discipline".The two hour video opens with Petrucci outlining numerous warm-up exercises he uses prior to gigs or practice sessions. These exercises are designed to strengthen your fretting hand your picking hand or both. These warm-ups alone are worth the price of the video all of them start at a reasonably simple level yet develop into virtually impossible exercises as variations are applied. That Petrucci plays each at quick tempos without flinching is testamount to his incredible technique.