我還真猜對了，那火不是火柴點的，是反射太陽聚光，象小時侯放大鏡照螞蟻

http://www.telegraph.co.uk/sport/olympics/picturegalleries/9256880/London-2012-Olympic-torch-begins-its-journey-after-being-lit-in-Olympia-Greece.html#?frame=2215633