I'm struggling to find my copy, but one of the first bible oddities that jumps to mind is from Celebrity Name Game: if one team managed to play a perfect round 1 and 2, and racked up the $3,000 before Craig's clue-giving round, the goal would simply increase. I'm 90% certain it was to $4,000 instead of 3, but alas, my copy is on some backup media that's not at arm's reach.
I don't have a copy of that set of rules, but from notes I made at the time, if one team reached $3,000 by the end of round two, then round three wouldn't be played. (I remember seeing some show-logo-backed cards lying around the office with words/phrases printed on them -- I assume the producers would have thrown together some sort of audience game to fill the time. Of course, seeing as no team ever went ten for ten in a single round over the course of three seasons, it was a safe bet they wouldn't need the backup game.) It was only in the extremely unlikely event of a $3,000–$3,000 tie at the end of round two that the goal for round three would be increased to $4,000.
At least by the time I was doing it, he was essentially reading a mini Fame Game (emphasis on mini) off his monitor. My memory tells me he was ad-libbing around that, but namely for color, and less for fact(s).
I wasn't around for season one, but I
think during that first season, Craig was left on his own to completely ad-lib the round three clues. By the time season two started, he was given clues to read to help keep him from giving an inaccurate description that a contestant could claim led them away from the correct answer. But yeah, if he wanted to go "off script," he was free to do so.
