Long, ill-cared for grass where a person finds themselves at greater risk of being picked off by prehistoric predators. Although dinosaurs are technically extinct, it's a confirmed fact in nature that tall grass is more likely to conceal Cretaceous killers than lawn that is mowed once a month.
#1: "Dude, stay out of that raptor grass, you're going to get bit by a snake." #2: "Holy shit when was the last time you cut the grass? It looks like the Land Before Time out here."