-Dry food, like a chip: it's safe for around a minute
-Wet food, like Mac and cheese: if it's on the floor, you ain't eating it anymore no matter what
-Still in wrapper / bag: it's free real estate
-Candy, like m&Ms or a gummy: yeah I'm eating that idc where it's been
-Has visible dirt on it, no wrapper: hell nah. Unless it's a gummy or an m&m; For me, the 5 second rule depends on several factors