Rob Spampinato on Instagram: "Thunderstruck is not about speed, it is about control. This hammer ons and pull offs exercise is how you build the stamina and clarity to play it clean without tensing up. Slow it down, let the fretting hand do the work, and watch your picking hand relax. If this clicks, the riff feels effortless instead of stressful. #thunderstruck #acdc #guitarlesson #hammerons #pullups"