Rolls-Royce interview questions

The interview was held at Derby County football stadium. There was many more candidates than I had expected but after chatting to a few of them I realised we were all from a similar background and in the same boat. We were all led to a room where we sat in a VIP box overlooking the pitch. After a short while I was called into a separate room. I was quite confident to start as I had some previous RR working experience. After a very short period I realised things were going horrible wrong and I began to sink into my chair. The younger lad asking the questions was pleasant but sitting next to him the older man "Value Stream Manager" tore apart every answer I gave even arguing at one stage. After the interview I was lead back to the room where we were split into groups and given a group exercise of making a bridge to carry a ping pong ball across 2 tables. That also went horribly wrong. On a whole I am glad I did not get offered this job as that was my worst interview I have ever been to. I was really struggling to understand how they could decide I was a good mechanical fitter from the questions they asked and the group exercise.