I was at the Spector web site and saw a Quicktime movie of Quintin Berry playing. I've never heard of this guy but he has the most unique tap/slap style I have ever seen. It's hard to describe: He wears the bass very high and curves his arm underneath. Check out the movies at http://spectorbass.com/NewFiles/webmovies.html to see for yourself.
What are your thoughts on this technique?
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And you may ask yourself, where does that highway go?
Well as far as the technique, I'd say it's mainly for "Wow!" factor though it could just be personal preference/comfort. I've seen those clips though and, regardless of how he holds/plays the bass, he is most definitely d@mn good.