At the center of the controversy was a promotion for a line of stainless-steel tumblers branded "SS Tank," with the company designating May 18 — the anniversary of a 1980 massacre in Gwangju, where the military dictatorship's deployment of troops, tanks, and helicopters killed or injured hundreds of pro-democracy demonstrators — as "Tank Day." Anger deepened over the campaign's chosen slogan, "Thwack it on the table!"— wording that many Koreans immediately connected to a discredited 1987 police account in which authorities falsely attributed the death of student activist Park Jong-chol, who had in fact been tortured, to investigators having "hit the desk with a thwack."