I can do this slap, with both sides of my right hand (thumb and palm). everyone knows how to slap with their thumb but I can do this one with that kunckle on my little finder where the finger meets the palm. so, when the thumb goes upwards off the string, then palm comes down and hits the string and vise versa. so, you can slap double as fast as what you can do with your thumb alone. has any one heard of this technique?
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