Friends of Ron Berg, the self-described 'human beat box,' don't have the heart to ask him to stop. 'Any time we're out, it's only a matter of time before Ron starts up with 'poom poom-pkkhh, poom-papoom-pkkhh,'' friend Brian Craig said Tuesday. 'But he's so proud of his 'special skill' that it'd devastate him if we told him he sucks and should stop.' Craig, who has been sprayed with beat-box saliva 'tons of times,' said he makes sure never to sit across from Berg at a bar where the jukebox contains Run-DMC's Raising Hell. 