Feature Request: http header HX-Redirect with value back

I would like to propose a feature related to the http header HX-Redirect: would it be possible to send `back(-x)` instead of an url?

**Use case:**
- I have a popup for an entity which has a unique url that can be triggered from different pages (so different referer urls)
- this form has a delete button allowing to delete this entity
- ideally, the user would go back after deleting the entity