heat oil heavy-duty pan with a well-fitting lid over medium heat

add salt

drop in a few kernels of popcorn and put the lid on

when they pop add the rest of corn, cover

shake briskly over the heat 3-4 times

when the popping starts shake more often to drop the unpopped kernels down towards the heat

the popping is about done when you can count to 3 between pops

turn the heat off, let it finish popping if needed

when the popping stops remove the lid, taste for salt, add more and serve!