Return the pan to the warmth. The popcorn ought to start popping quickly, and unexpectedly. As soon as the popping begins in earnest, gently shake the pan by transferring it forwards and backwards over the burner. Attempt to hold the lid barely ajar to let the steam from the popcorn launch (the popcorn might be drier and crisper). As soon as the popping slows to a number of seconds between pops, take away the pan from the warmth, take away the lid, and dump the popcorn instantly into a large bowl. With this system, practically all the kernels pop, and nothing burns.
