C# 'that' keyword

My younger brother, Danny, is doing the same graduate program that I did at the University of Florida. Recently he was given a pop quiz from one of my favorite professors where he was asked to describe what the that keyword does in C#. I must admit - I was also initially stumped because I didn't expect it to be a trick question... I figured maybe, since I focus on J#, I just hadn't encountered the C# keyword (perhaps it was part of C# 2.0 and I hadn't noticed). Ok, ok, so really I have no good excuse...

But my question for the readers of my blog: If there was a that keyword for C#, what would it be used for? Accepting all answers, real or absurd. I'll post the best ones here. BrianKel at Microsoft dot com. Who knows, maybe I'll ask Dan to champion the best responses with Anders to consider for C# 3.0? :-)