This big prehistoric-looking bug is walking on my ceiling. It has weird flared back legs and looks intimidating. Is it going to bite?

and its brownish coloration with a yellowish pattern along the edges of its abdomen. Unlike stink bugs, they do not emit a strong odor when disturbed. Roaches, on the other hand, have a more oval, flattened body shape and lack the flared hind legs.

Careful observation of these features will help in correctly identifying the bug and alleviating any unwarranted concerns about more harmful pests.