Unbend old bike

[dude]

I have a very old (and very good looking) bike.

The only problem is that the head has been bent by a shock.

I'm wondering what would be the least suicidal approach to try to straighten it back without breaking it.

Should I just try to hit it with a sledge hammer or should I try a slow solution like stick it into some corner and bend it, should I heat it up,...

https://drive.google.com/file/d/0By-S838OebDHdzhueHI5Vm05T2M/view?usp=sharing

https://drive.google.com/file/d/0By-S838OebDHaTFDYzYyR201Zzg/view?usp=sharing

Thanks