UO Second Age

I currently have a few characters: None of which have GM taming, which led me to this question...

Can any character ride a nightmare?

I have seen nightmares for sale, I was wondering do they buck you off if your taming is not high enough?

I assume if you jumped off a nightmare for any extended period of time, on a non-tamer, it would come to the realization it "is better off on it's own", however what if I just wanted to look sexy on my crafter? Would I be able to ride a nightmare around without the risk of losing it?

U can ride, u just cant control it while dismounted

you can ride it but you can't give it any commands (not even to follow you).