Also didn't know he had anything to do w/ "X-Men". It was okay but the 2nd and 3rd films may have been better (not sure- haven't seen any of them since they were originally released)
According to Wiki, he also wrote/cowrote "Toy Story", "Speed", "The Quick & The Dead", "Twister" and mother####ing "Waterworld". And a couple episodes of the US version of "The Office". Quite the resume.