DAY 155 - So...I guess these people can dance?

So I can totally dance... The dance craze continues as we watch as the multitudes of dancers are slowly whittled down on So You Think You Can Dance..  I'm stickin' with it for now, but still pretty much confused by what makes a good dancer.  The only ones I've thought were really awesome so far are the two tap dancing brothers.  I'm told it gets better after the top 20 are chosen.  I hope so, so far I'm just looking for a stellar grapevine, ball change.