VS.NET Bug? Easter Egg?

After "Collapsing to Definitions" (Cntl-M,Cntl-O), Visual Studio decided to color the collapsed code section in black, white and red:

Can anyone clue me in on what/why that is?  It happened consistently while VS.NET was open, but only for that specific method.  After rebooting VS.NET I can't recreate this, so its a good thing I took a screenshot. 

This is VS.NET 2005 RC1.