Heat olive oil in a medium saucepan and pour in the corn. Put a lid on the pan, and shake it over the heat until the popping stops. Remove from heat and leave the lid on for a few minutes.
In a microwave-safe glass dish, melt the butter in the microwave for 30 seconds, add the cinnamon and stir. Pour the popcorn into a serving bowl and drizzle with the cinnamon and butter mixture.