Set a flat bench in the middle of a Smith machine so that the bar lowers to your middle chest. Lie back, grasp the bar with a shoulder-width grip and unhook the latches. Slowly lower the bar to your chest just as you would during a normal bench press set. When the bar reaches your chest, explosively press it up so that you throw the bar up as high as possible, to the point that it actually leaves your hands at the top. Upon release, keep your arms extended with a slight bend in the elbows and catch the weight as it comes back down. Reset your hands so they’re even before doing the next rep.
One-Arm Smith Machine Power Row