Okay, you know when you've got the plans all figured out for everyone's parts and instruments, but on the day of the gig, someone just comes into town and hasn't been playing with you in the rehearsals.. They don't know that when you play "x" it's a particular "x" from a selection of "x-s"..
Check out Rapa's face when I take the shaker out of his hand and point to the other one on the floor when the rezo changes to Ellegua.. Nothing ever happens exactly as you plan it..
http://mrcrowder.us/cong/bem.m4v