If you ever have to give a 40+ minute presentation about a paper you don’t adequately understand, the following tips may help:
Copy every major idea verbatim into your notes and read that to your audience.
Ask your professor to explain the things you didn’t understand whenever possible.
Waste time by copying every example from the paper onto the board and explaining them in detail.
Have a partner and alternate talking about topics. The one not speaking can read ahead in the paper or notes to prepare for the next topic.
I suppose you could play dumb to stretch the second one out. I think that was the longest hour and a half of my life, or close to it. Landin can’t write to save his life and can bite my shiny metal ass.