Jack doesn't really know much about the Force and how it manifests in Leia, and he's very much not himself at the moment so knowing probably wouldn't help very much anyway.
He draws breath to point out that she's speaking loudly enough right now to show everyone within a couple of blocks where she is, but all that comes out is a slightly histerical giggle. He clamps a hand over his mouth and tries to muffle them because he suddenly realises the eerie laughter isn't all coming from him. There are wasps on their way too.