Mike, I'm hoping you can provide some help. I play in a church gospel band. Sometimes, our songs last 10-15 minutes because we might spend some time during each song playing free form. It's during this time that I become clueless. I have no idea where our jazz keyboardist is going (I'm not too familiar with jazz progressions) and often I just stop playing because I want them to have the freedom to go where they want and I don't want to play anything that will clash with them. I often look at their left hand to see if I can discern some sort of pattern so that I can start playing along, but often, I can't see a repetitive pattern. What I see them playing with their left hand doesn't make sense to me, but the music that results is so beautiful so I know they know what they're doing. Is it me or would even a highly educated and musical bassist be at a loss? Any suggestions when doing improv? Thanks.