PagerDuty webhooks facilitate the creation of applications and tools that can automatically respond to incidents by receiving real-time updates as they are triggered, acknowledged, and resolved, bypassing the need for continuous polling of APIs. An example of a creative use of webhooks involves a project by a web engineer who developed a system that audibly announces incident messages in an Irish accent using Mac OS X's text-to-speech feature. To set up such a system, users require a spare computer, speakers, a text-to-speech tool, and a localhost tunneling solution like ngrok to direct PagerDuty incidents to their internal webhook endpoint. The process includes creating a webhook in PagerDuty's interface and using tools like "tootles," a simple Node.js server, to receive and process incident notifications. The output can be piped to various destinations, such as speakers for audible alerts or printers for physical copies. Additional customization is possible with cloud-hosted solutions like webscript.io, and PagerDuty encourages users to explore the integration potential of webhooks and offers support for implementation.