Never been bitten but have had many encounters with bears.
Here is one...
I once had a Sow and 2 cubs at a bait site in Lake Counties Cherry Valley Township in the Baldwin District .
A larger boar was starting to approach the bait when all hell broke loose.Mom chases off Boar while one of the cubs run/climb up MY TREE. The cub climbed up above me and starting raising hell.
Mom returned and climbed halfway up my tree several times and swayed nervously under my tree swaying back and forth chopping her teeth.After what seemed like 20 minutes (probably 5 min)of me being very nervous the cub climbed onto another tree and climbed down and they all scampered off.
They actually came back the next night and many times after .Mom actually seemed to realize I was no threat but she would come to the base of my tree and look at me regularly.
FYI... I was armed but would Only shoot the bear as a VERY last resort under this circumstance.I actually spoke to her in a non threatning low voice. I am not sure if that helped.
One more interesting note....This sow had 4 cubs 2 years later and showed up at my bait site hundreds of times .She also would allow the sow cub from the previuos litter (the cub in my tree)to hang around most of the time.
Sorry about the story but this article brought back memories lol