20q.net will make you cooler

For those of you who are totally uncool and would like a way to start getting cooler, check out www.20q.net, or click here, here or here. You think of something in your head. It could be anything at all, like a "brick" or "stop sign" or "poop". It will ask you a series of questions to which you respond "yes", "no", "sometimes", etc... By the 20th question, it will guess what you are thinking. It's correct about 80% of the time. Remarkably, it asks some pretty horrible questions, but still somehow manages to guess what you are thinking. For instance, if you are thinking of a "piano", it might ask

1) Is it heavier then 2.5 cars (you respond maybe)
2) Does it stick to the moon (you respond no)
3) Are you tired of how it tastes (you respond no)
4) I'm guessing you are a piano? (you respond Yes)