the thing is

furrykef   Mon Jul 16, 2007 7:53 am GMT
Hmm, I haven't heard that one.
M56   Mon Jul 16, 2007 9:22 am GMT
<I've hear "there's a thing", meaning something strange or surprising".

There's a thing, I just saw Mary in the street and she didn't even say hello.">

I've heard it as "here's a (funny/strange) thing...".