You really don't know who Fletch is? Jesus! Nevermind, it wasn't that funny of a joke anyway. I just went through the full flight physical a month ago so I'll take a jab at this.
Much of it is very redundant from the MEPs physical. You know, height, weight, blood pressure, etc. But they throw in an EKG, chest x-ray, and they took 8 vials of blood from me. Yes 8!. Hearing test again, eyes including color and depth perception, then the full cycloplegic where they dialte your eyes. There's also a full dental exam, so brush your fangs real good prior. Keep in mind that they are looking for anything to disqaulify you with. At the end was the flight surgeons exam. For myself this was done by a Navy Captain. Honestly this part felt more like an interview to me than a physical.
Most important is that you give the impression that you believe you are in tip top shape. Don't go in there and pull the hypochondriac crap that some candidates do. "Well you know, Doc, sometimes my balls hurt when..."
Or "Well when I was a kid I swallowed 12 gallons of paint and..."
"No, I've never had a cold, or a headache, or anything else. I always feel great" Is the order of the day.
Expect about 6 hours or so dependong on how many others are going through with you.