Angular momentum

I'm sorry to bother you all with this question. I was just playing around
with a problem I found in a book. It is a simple problem where in a man sits
on a stoll free to ratate without friction and is spun around while he holds
two 3kg weights. we are given the moment of inertia of the man+stool,
initial speed and the fact that the weights are 1m from the axis of
rotation. The man then contracts his arms to 0.3m from the axis of rotation.
Obviously the man will go faster because of this, but when I calculated the
initial and final kinetic energies, they were VERY differant. Where did all
that extra energy come from? Or did I calculate the energy wrong?