Heat a large skillet or medium sized pot over medium/high heat. Add bacon grease and wait until the grease melts.
Add one kernel to the skillet/pot and cover with a splatter guard until the kernel pops. This indicates that the grease is hot enough now to pop the rest. Pour the rest of the kernels into the skillet/pot and cover with the splatter guard. Shake constantly and the kernels will begin to pop.
When the kernels start to slow down their popping, begin counting seconds between pops. The popcorn will be done when there is about 4-5 seconds in between two pops. Remove from heat.
Melt the chocolate in the microwave by heating it in a bowl for 10 second intervals, stir the chocolate in between intervals. Once the chocolate is smooth and melted, drizzle over the popcorn.
Sprinkle the sea salt over the popcorn before the chocolate hardens. Mix the popcorn lightly and then divide into two serving bowls and enjoy!