Little story from my DM
Two people in one of the parties that he DMs for had a chaotic evil thief and a lawfull good palidin. The thief stole the Palidin's gold. When the Palidin went to get the gold back, the thief tryed to kick the Palidin... and got a critical miss. The thief ended up triping and hitting the back of his head on a bedside table, knocking himself unconcious for 3 days.
I myself have found that making it so magic in the realm isn't working exactly right is always fun. The color spray of doom that killed more then it was supposed to and the resurection spell gone wrong making the character undead was fun. I'd like to see my DM do it though. He's

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"Your losing, press ctrl+alt+del!" ~Deadlock~
"Check your score with alt+F4!" ~Just Plain Fun~