...such as, "What does water do at 32°F? Freeze? Turn sentient...? That was an actual Q a couple of nights ago (can't remember what the third choice was). Believe it or not, something like 8,000 people were eliminated on that one. (There are usually more than half a million people playing at the start.)
It's not all "savage" questions; a lot depends on your areas of trivia expertise. For instance, I knew that a "noisy ghost" is a "poltergeist" (and not a "banshee" or a "spectre" ) -- but that question knocked out a full half of the remaining players (around 80,000 people, IIRC).
It helps if you're up on current pop culture (not my thing, but I have to know some of that stuff because of the work I do), as does a good grasp of the day's political goings-on.
So, try it! It really is fun (if occasionally frustrating), it's free, and there's not a big time investment -- each game lasts only a few minutes. And you can win real money -- although, since the payout is aggregate, it might only be a dollar or two. But a buck's a buck. 
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