The father was crazy...
... If he expected an 11 year old David, to play the Rach 3 (as we saw in the film.) I'm a huge fan of this movie but haven't seen it in some time. At the moment I'm listening to Rach 3 on youtube performed by an orchestra back in 1982... It's a ^&%$ POWERFUL piece of music. You can't expect that from someone so young, even Mr Rosen said so!