In the last one year I had three opportunities to play in front of the audience. And all the three times I made very unsatisfying performances, while I always had been not that bad at the former public performances. At the early ages I didn't know the stagefright as it's probably the case at the most children. After that periode I hadn't get the chance to play for other people for a while, until I did that on a reliable Steinway several times. It was the grand, on which I always practiced, so I did know the instrument well. Also in the case that I got very nervous for the performance, I could manage to calm myself down, once I began to play on it. The recent three times have in common that I had to play on instruments which is unfamiliar to me and also in a very horrible condition. I was also not that nervous before the performances, but after beginning the playing I was frightend how my finger are stiff and not willing to move on the keyboard. Of course I had time to warm up before the performances, but while I was waiting for my turn my finger turned stiff and very cold. And the result was uncountable slips/wrong notes and painful memories about unsuccessful performances. I'd like ask you guys, how you warm up on an unfamiliar piano and if you have tips for me and concerning my problem. I have to play once more in such a condition - one of the problems of amateurs I think is that they are often asked to play on a untuned, not well-cared piano - on the January 17th. Thank you in advance!!!