i think i ripped off floyd tillman a little bit somewhere along the way. >> larry: do you hear musicld, you know, sit down and write something right now. you know, who knows if it would be any good or not. it would be something. any songwriter, if you're a pro, you ought to be able to write on the spot. >> larry: you often perform with your younger sons. are they on tour with you? >> they're starting out with me. lukas is playing opening for me on the next tour that i started. >> larry: must be very proud. >> that's exciting, yeah. >> larry: tell me about bio willie. what is that? >> larry: that is the name of a product, biodiesel, that we developed, made out of vegetable oil from restaurants. and we use it to fuel the trucks, diesel engines. >> larry: cal fussman who wrote my book with me, he has a mercedes that runs on that. >> yeah. >> larry: he gets it from restaurants. >> yeah, absolutely. it is the new thing. >> larry: you're riding on grease. >> vegetable oil, yes. >> larry: you have it on your bus? >> have it on the bus also. >> larry: you seem to have lived pretty much by yo