I had a weird experience the other night. I got some new-to-me instant oriental noodle soup at the Asian grocery, labeled "hot". It was yam-noodle instead of wheat noodle, you pour the hot water over the noodles, wait and then add the seasonings. HOT it was indeed! I didn't eat much of it because of that. But it had the effect of a strong cup of coffee...I was awake and aware, to the place that I had to take some sleeping help.

Has anyone else had this experience? Is it the chilli-powder/spice stimulation, or something else? I couldn't read much, the ingredients were translated but it just said "spices".