system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why are roaches and other insects sometimes discovered upside down when they’re dead?
gpt
Many insects legs will curl under them when they die. This makes for a very unstable tumbleweed of limbs on one side and a comparitively flat back on the other. Insect remains are incredibly lightweight and can be disturbed by anything from light breezes to other bugs scurrying by, so there will be many opportunities for the corpse to be flipped on its back where it is most stable at rest.

Also any bug flipped on its back and not struggling obviously to right itself is pretty clearly a dead bug. If a bug is dead and right side up then it might at first glance just register as bug not currently moving. Most people see a lot of insects without physically investigating whether or not they're dead.