I’ve learnt this through trial and error (and a few oven burns!): how to flip the chicken when roasting my Zuni roast chicken. It isn’t easy, but I’ve had lots of practice.
Take a spatula, handle-side up, and push it into the cavity, with a fork to secure it. Give it a shake to release it from the pan, then flip it over. Look at that lovely crispy bottom!
The chickens go back into the oven for 20 minutes on their breasts, then get flipped back the same way. Notice I put a pinny on too, because it spits a lot.