@Kaartic points out in T196893#4727233 that when visiting the non-JS fallback for watching a page there is no way to cancel/return to the page.
On Minerva after watching a page you see:
On Vector the experience has similar problems (but at least you can click the "read" tab at the top.
I'm guessing it would make sense for the page title to be a link and to add a "no" option in this form: