I had a similar experience to the above. From what I have heard from others, much the same thing, so I guess the best advice is relax and go with the flow - after all, you're probably wanting to do this as a hobby so you may as well enjoy it.
I am convinced that examiners pile on the pressure to see how you react to make sure you don't flip out - would anyone like to comment?
I did both parts of the test together, and was absolutely drained at the end, so I would be inclined to say split it into two. Also, get your nav planning down pat, as you only get an hour to plan a route that you've never seen before. Don't forget to ask the examiner how much they weigh before doing your weight and balance as well.
Cheers and good luck with your test.