Okay, on the last level, Maul died with half his health left. What's up with that?
  Let me give you the details: I am on the PSX version, and am using the invincibility cheat. I threw 20 Gungan Balls at him, started slicing, and he ran to the bridge. I fired a few dozen blaster shots at him, and he deflected them all. I got out my Proton Launcher, and he keels over. 
 Most times when he dies, there's a little bit of health left. 
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http://www.thehellhole.com/pictures/3dpics/darthmaulprv.gif) 
 Dave Maul