Don't you think it is a bit too round to ride on? I mean the idea is brilliant without a doubt, but maybe add a saddle of some sort.
Haha, if you have ever seen humungofrog from the back when not in a fight yourself, you can see a slight flat part above the big bulging bubble that makes up most of its body. There can be a saddle there and you can ride it. But of course the mount isn't going to be that big! That'd be pretty crazy to work with. Which is why I said it can be the size of a lioness mount or like the griffon mounts you see in the spiral.
boing boing boing. I love it's feminine drunk looking eyes haha