Yes I am gentle...well at least with axes:) Hard to convince someone to let you use them as a pell if you decapitated your last training partner:)
The heads are very light and indeed hammer like in weight. It is important to be able to swing the mountain axe single handed as well as two handed so it has to be light.
I have a few pics to share:

One I made myself in the Hungarian fokos manner. Fokos literaly means 'backed' this has aa hammer ont he opposite side. Very easy to make, a shingling hatchet on an old rake handle. Wicked light and fast but hits with a ton of force.

A traditional Hutsul style axe

THis is along the lines of the Slovak and Polish styles of axe...this is not mine but i have one very similar that I need to get a pic of. WHen i do I will post it.