So a giant rhino is charging at you...

[Gold & Appel Inc]

Originally Posted by RogerBacon

OK, this is a really, big mutant rhino that is 3 hexes wide. It does a charge attack with the intention of trampling and/or goring you. Can you dodge?

You can definitely Dodge the goring, and you can Dodge the Trampling (at a penalty if you're a valid target ie: Prone), but for a creature that big, I would definitely say that you have to be able to put yourself outside its entire path to avoid the large creature auto-Slam effect, because if you don't get outside of that area it's still moving through your hex.

Originally Posted by RogerBacon

A person with a move of less than 20 can only step to the side one hex [snip]

< 11, actually.

Originally Posted by RogerBacon

In a related question, if there is an area affect attack, that is bigger than your step, there is no way to dodge it unless your 'step' lets you get behind cover, right?

Yep.

Originally Posted by RogerBacon

It seems like an artifact of turn-based movement to me and there should be some way to get your full move worth of 'step' when dodging by giving up your action for the next turn. Has anyone tried this?

Nope, haven't tried it. Might make a good cinematic house rule in campaigns where nobody has super-speed and things go BOOM a lot.