private void UpdateExplosions()
{
for (int i = 0; i < Model.ExplosionList.Count; i++)
{
Explosion e = Model.ExplosionList.ElementAt(i);
if (e.FramesLeftToLive > 0)
{
e.FramesLeftToLive--;
}
else
{
e.Mass = 0;
if (e.AnimationFinished())
{
Model.Remove(e);
}
}
}
}