So this may seem like a novice question but I'm having troubles with doing that horizontal, finger shaking vibrato. I can do it but it just doesn't sound right to me. I know of the string bending vertical vibrato but I like the way the horizontal one sounds. I know you have to go over the fret and back but does anyone have any tips on how I can do this cleaner and make is sound more defined? Should I just go crazy and slide up and down randomly or should I try to shake it just over the fret? It looks very simple but I'm just getting hung up on it.