Mkst frustrating I had experienced first hand was when I worked at a small, family owned grocery store. There was a cooled bunker display of grated parmasean cheese that was packaged in-house. One day I found a half-melted Carvel ice cream cake on top of the cheese containers. The frozen Carvel bunker was literally immediately behind the cheese. Someone took an ice cream cake out, turned around, decides they didn’t want the cake, and placed it on a slightly-cooler-than-room-temperature display when they were equally close to putting it back where it came from…