MY Brain is like this - it is INCREDIBLY frustrating. Thankfully most of my co-workers & friends over the years have learned to understand this and be patient.
If you ask me a complicated question (for instance, yesterday I was talking with my friend about my horses' feet and whether or not she needed some supplements to her diet). I sort of have to turn off my working-brain and go back into my memory banks to dreg up that information. I can give a very informed answer after about 30 minutes, but if I try to spit something out right away it comes out as complete non-sense.
Hope that helps :\
