How Bruce Willis turned into Tony Hawk

http://www.gamasutra.com/features/20000628a/fristrom_01.htm

Great article discussing how the engine created for Apocalypse, a kind of obscure game for the Playstation (I myself don't remember it, and I remember a lot of useless things) starring Bruce Willis turned into the engine for one of the best games ever, Tony Hawk's Pro Skater. It even mentions physics algorithms being written in Assembly, which makes me cry a little every time I read it.