Just yesterday, during my band's jam session, we were trying to improvise on the middle part of the song "Cissy Strut", this is the first time where both me (bass) and the guitarist attempts to improvise together, attempting to copy's Jaco's work in Live in NYC on the same song. There were occasions where I played some other patterns, and the drummer got a bit lost, attempted to follow my bass, and the guitarist got completely lost. That's just like 20 seconds into the solo part! For guitarist improvisation, he can just play-stop-think-play-stop-think, since most of the molodies have rest bars, and it won't sound weird, but for the bass, once I stop playing (trying to get more ideas), everyone seemed to be lost! So many times I read newbies ( I was one of them ) coming up to TB saying Bass is easy or Bass is boring, and all the while, I was trying to convince myself Bass is not easy and bass is not boring. But yesterday, after that session, it really hits me why the pros have mentioned that Bass is one of the hardest instrument to master!