Oh, I almost forgot, I made an addition to the lesson that worked well for me.
Earlier in the semester, I went over Greek and Latin roots, so at the beginning of the slide show, I added a slide with the word "Triskaidekaphobia" (fear of the number 13) and I asked the class what that word means. On the second click for the same slide, I broke down the word, "Tri(s)--three" "kai--and" "deka--ten" "phobia--fear". I told them that this was the most common superstition in the US and Europe and gave them examples like the photo of the elevator without 13th floor.