Finding examples of this TV trope

I recently was thinking of an example that I swear I’ve seen at least once (if not a few times) in Family Guy. Here is the setup:

• a character, often a woman (Lois in the case of Family Guy), goes on a long rant about something; for example, she may be upset with a man (Peter in the case of Family Guy) and is admonishing him over his behavior, or perhaps she is talking about a topic that she is interested in but the man is clearly not interested in.

• the second character (Peter in our example) seems to somewhat detach from the situation, perhaps mumbling “mmm hmm” or “uh huh” on occasion, and starts to perform some seemingly mundane series of tasks leading to a sinister suicide-like event (for instance, grabbing a chair, grabbing a rope, throwing the rope over a beam, tying it around his own neck…, or maybe slowly bringing a gun into frame while still engaged in the conversation).

The thing is, I can’t seem to find examples of this “character-is-so-bored-or-detached-that-they’d-rather-casually-commit-suicide-unnoticed-than-remain-engaged-in-the-conversation” moment in the series. I am almost certain it’s happened multiple times - between Lois and Peter, maybe between Lois and Stewie, and maybe even between Brian and Stewie. But I can’t seem to find them! Can anyone help with an episode name, description of the situation, and/or a clip?

Even examples from other shows would be welcome.

Thanks for trying to help!
-Shawn