In response to striking rates of childhood obesity in Oregon, advocates led by a nurse lobbyist proposed legislation in 2005 to regulate junk foods in public schools. Several theories propose to explain the policy-making process, yet Senate Bill 560 (SB 560) followed a twisted course through rule making, legislative and political processes that are not well articulated in policy theory. Three overlapping mechanisms were identified in content analysis of documents and interviews with participants in the SB 560 policy process. Strategically placed legislative "banana peels," proponents' amateur advocacy, and legislative outflanking by professional lobbyists more fully characterize this policy process and better account for the failure of SB 560. Subsequent passage of the Oregon Healthy School Foods bill in the more politically conducive 2007 legislature suggest that advocacy and incremental change frameworks are less predictive of successful passage than is the ability to take advantage of political opportunities to change public health policy.