when i was in china this past summer, we went on a hill type thing.. i swear it was a hill.. like i was sitting on the bus.. back to the back of the seat cause we were facing uphill, and we were moving forward...................
alright.. now that i read it, it sounds really really stupid.. since wer'e moving forward.. but the guy turned off the engine of the bus and everything! it was pretty cool.. i dunno how it can be an optical illusion if i actually felt myself facing uphill.. but i dunno..