Two popular 'Out Talks' that my dad used to give were already mentioned in this thread: 'A Godly View of Sex and Marriage' and 'Deliver Us From the Wicked One'.
Deliver Us from the Wicked One was about demons. I almost always went with him when he gave that talk. The other one... Not so much.
I wish I could remember the subject of the talk at the last regular meeting I attended. The talk that I got up and walked out of. I'm not sure if the subject matter itself was creepy of just the delivery style of the speaker. Regardless, I was creeped out and could not sit in my seat and participate anymore. I can see the speaker's face but cannot remember his name.
-Aude.