As painful as it is to see Maul beg, I honestly can't really blame him after watching Sids fight like that. Plus it actually 'does' fit with his character when you consider just how deeply abused and broken he was by Sids over time. Sids was everything to him. Yes, there was one point where he wanted to kill him in the EU (in a final test right before being promoted to a Sith Lord), but never before did he actually get to go toe to toe with his master. Sidious stopped the test before they could actually fight. He also wanted to kill him right here and look how that turned out. His overconfidence was quickly abolished by this decimation, and the Sith are indeed cowards in the end. Like I said earlier, even after reading the book the fight was more intense than I expected. (The book did not mention maul using the dark saber). Sids moonwalked Savage to death. I couldn't be more impressed with him. That and... "There is no mercy" alone is worth a whiney Maul.