Nahkuri said:
Probably 200+ with a lance, or something.
On a sidenote, I slashed a nervous man on horseback for damage of 70-75, and he survived. That was pretty epic. I wonder how I could give them axes and armour and use them to replace my Huscarls.
Yep, I once had a nervous man that took 3 hits before dying. First two combined delivered 73 damage, the third one was weak (on purpose - using a weak weapon) and did 9 damage (that's when the bastard fell down). so I can surely say "nervous man" has something between 74 and 82 hit points.
Upside to it: take a weak bow and some bent arrows and turn the guy into a walking pin cushion!!!
(don't forget to upload the screenshot here)