In a heavy bottomed vessel add oil / butter.
Add the corn when the oil gets hot. Add salt.
Wait for one corn to pop, when it pops close lid and wait for other corns to pop. Toss the vessel in between with the lid closed.
When the popping sound stops, open lid and transfer the corns into a bowl.
Sprinkle chilli powder and toss again.
Spicy pop corn is ready.
My Tip: You can try with pepper also.