Does the momentum from the arms transfer to the body if you stop it when jumping?

Question

so if you jump vertically and you swing your arms forward to give them an angular momentum and then your arms reaches it's limit. does the angular momentum transfer to the body as a whole causing a back flip? i know the angular momentum has to be conserved. L=IW.

Answer 1

The angular momentum of the entire body is conserved.

Answer 2

so the entire body would rotate right?