Try this, you need to be pretty high for it to work properly. It works well with MDMA, but is unbeleivable on 'shrooms. Anyway;
Place 1 hand on someones forehead, and the other hand at the back of their neck just bellow their head. Now, with the hand on their neck, rub up and down the back of their head from the neck right to the top of their head. You need to apply quite a bit of pressure with both hands. Do this for about 2 minutes. Continually rubbing up and down. Concentrate all your energy on thinking about what your doing. Get them to keep their eyes closed and make sure they think about nothing but your hands on their head. Now, after about 2 minutes (they're eyes must still be closed). Slowly start moving your hands from their head. VERY SLoWLY. after about 30 seconds each hand should be about 6 inches from their head, ie on 6 inches behind their head, one 6inches in front, now, at the same slow speed, move them back till they are firmly clasping their head again. ALL DONE. they may now open their eys. If done properly. THe will have felt an extremely weird sensation as though their head and psyc had been expanded somewhat then then put back normally. Also, you can do this without moving your hands back to their head, this is quite funny, because it feels as though your head as been completely contorted somewhat, and then not pu back together again.