I'm six years late to the party, but with 6 extra seasons of knowledge, my personal favorite Frank gun appearance is in this very episode.

I don't think Mac's Mom cared a single bit, as she seemed to be trying to shut up Charlie's Mom as she was telling the story, like she knew it was too much information and gross.

Well, Heather Donahue did play the girl with the horrible kid who pretended it was Charlies in "Charlie Wants an Abortion". So there may be some connection, who knows.

I really don't know if failing twice is a subtle joke, two consecutive farts of the mind or it's auto-correct errors.