It is quite common during the first clinical year for med 
students to suddenly "pass out" from standing bedside too 
long. I remember one of these sessions where the patient was 
an English tourist visiting Malaysia, and ended up sick in my 
hospital.  We were all gathered in the patient's room and the 
clinician went on and on and on.  The patient was clearly 
waiting for something to happen.  Finally the clinician asked for 
a volunteer to do a basic physical on the young man.  The next 
thing we knew, one of the junior med students had fainted, and 
landed face down onto the patient's crotch.  He must be one
impressed tourist.