@jdbloom: I wish that Slime time was all on Netflix, so I could watch. My friend was on when he was a kid too. He said that one of the kids that beat them said "Way to lose, loser" to him in the locker room. Haunting stuff.
@PsEG: We actually figured out some tricks about that, funny you should ask. Two of my friends were on the show, too: http://www.fredericknewspost.com/sections/news/display.htm?StoryID=143660#.UK50WofAd8F
We noticed something: occasionally, they show you the categories before they randomize them. They are in difficulty order we think, from hardest to easiest. The Casey at The Bat question was my 9, and the touchscreen was my 10. Definitely my hardest categories. They don't always show it, but it seems to work.