[klausa]

One interesting way of using this I've heard of; is attaching it to a `-[UIViewController dealloc]`, and being able to "hear" (or rather notice the lack of sound) retain cycles this way.

[karmelapple]

I've used it so many times doing that, and also handling UIWebView events where I didn't know what all might happen. Really helpful.

[iosguyryan]

This is the way