It helps to add a bit of humor to your presentation if you want to make it more memorable, and adding funny slides and sayings will definitely make your speech go over better with your audience.
Just make sure the audience is laughing at your jokes and not cracking up at your dumb slide full of stupid work phrases spelled out in hideous fonts.
Making sure the joke matches the subject matter is always a good way to get a laugh, and college professors truly excel at creating Powerpoint slides their students will never forget.
But Powerpoint presentations aren't just for high school and college students anymore, check out this howling good slide created by a third grader for a presentation on wolves:
See 10+ Presentations That People Certainly Won't Forget here