Takes me back - I was involved in the planning for the first BSides in London. Unfortunately, I emigrated before the day,,, we did have a nice Curry just before thought.
The interns would be well advised to know must be very respectful of their elders (who are probably very dignified and important and never froze on a presentation, no that never happened), use only properly licensed clip-art and must ensure they face the slides and read everything meticulously... even the bullet points. 😛
Well... probably not - My real advice is they warm up by playing powerpoint roulette and aim present slides made up of nothing but alternating wildlife photos and embedded videos from Ethereal(old Wireshark) - It will be more sporting that way.