Mostly questions about your past health, try and work out when you had any major childhood diseases and/or innoculations beforehand. Have you ever broken any bones, of so which ones, when and how. Have you ever had..... list of ilnesses, diseases. Strip to your underwear, get poked and prodded to make sure everything is in the right place, check you have the standard issue number of limbs, not hiding any scars (ie operations) etc. Check blood pressure, pulse rate, breathing. No tricks, all very standard.