of course it is, and of course they do!! There won't be anything scary, it'll be fine.
I can guarantee they won't ask you to do the cancan across the office, or tightrope walk to the next building (damn health and safety!! :;): )
Why don't you go and make a cup of tea, or read - something to distract you from thinking about it? I've gotta go now, but good luck - not that you need it! - and remember, you'll be fine, what will be will be.
And check back in later to let us know how you got on!!