I was once not hired for a job i applied for (during the interview i was cross questioned a bit like an interrogation but a lot like i had done something wrong and this was my trial!), after the interview, his assistant was really kind and said to me,"really sorry about, that is my bosses confrontation style ..." then i was told they would like to see me again!

But after some thought (1 second), i just wanted not to go back again ... so maybe meaningful feedback to the interviewer/company would be useful too ...