Robert Crumb, more widely known as R. Crumb, is an advertising icon and mascot of the Keep on Truckin' Company, appearing in many of their commercials. Many commercials from 1965 until 2004 (returned in 2009 to 2011 and 2013 in a Fritz the Cat Commercial) conclude with a school girl's finger poking Crumb's stomach. Crumb responds by rubbing his stomach and giggling ("Keep on Truckin!," or earlier on, a slight giggle "hee hee"), and laying a crumb.
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