I went with Wal-Mart specifically to paint a picture of the faulty decision-making in the scenario, figured its infamy would still work internationally but I’ve edited the previous comment. Part of it was misremembering the setting of the 2004 “Dawn of the Dead” remake but that took place in a mall like the original. The past few years (and, to be honest, most of the ones before that) have shaken my confidence in the idea of common sense around here as well.