Sounds easy---tell the guy to **** ***! But much depends on the personality of the rookie you're dealing with. If he/she is an obvious big-head, and without any justification for wearing that outsize hat, then **** *** ! is entirely deserved and appropriate. If he just hapens to be a "young hopeful", however, and depending for his "practice" on the forbearance of the more experienced sessioneers, then it becomes , for any decent m.c., a moral dilemma. If the guy himself is decent enough he will understand the upset he causes if it is pointed out to him. If obstinacy is his reaction---then tell him to **** ***!!