Erik Darling wait until the phone stops ringing and checks caller ID to see who bothered him:
Most applications have a grace period that they’ll let queries run for before they time out. One thing that I notice people really hate is when that happens, because sometimes the effects are pretty rough.
You might have to roll back some long running modification.
Even if you have Accelerated Database Recovery enabled so that the back roll is instant, you may have have 10-30 seconds of blocking.
Or just like, unhappy users because they can’t get access to the information they want.
Monitoring for those timeouts is pretty straight forward with Extended Events.
Click through for a query Erik uses for the task.