Very hot peppers. They initially cause you to get all teary snotty. But they make you sweat, increase your pulse (for the really hot peppers), this in turn causes you to have a wicked head rush. It' is perferable to eat outside, ie if you're in Asia, an outdoor Noodle place. As you will have this strange numbness in your mouth, and your skin.... You'll feel warmer...I eat it for the numb tounge feeling, or numb lips feeling (like Hot jerky sticks do this). Just make yourself some suicide quality chilli. Use this as a stimulant too before games.
-Ginger can have this effect. Go to your neighborhood grocery store, get lots of Ginger roots. And you boil them (use a metal kettel, or a pot. And you drink it concentrated. The beauty of this is, that once you peel and dice the Gingers. Very little goes a LONG LONG way. They come in very THICK roots, so just coin slice them, but put lots for a GOOOD high! You should feel very very warm. Comparable to the effects of some spirits (liqour). Now this provokes the question. What do you get when you mix a party drink like Barcardi, or Gin, or something with kick, and ginger tea? hmmmmmm....
Anyways, The good thing is you don't get drunk or have a hang over, and you can get yourself feeling a pleasant warm buzz for the fraction of a price. Ginger is very very cheap like 50 cents a pound? (They're very light, so you can get ALOT for a pound).
You eat the soggy Ginger after wards for even more high.....
See natural highs are good....