Funny you mentioned Bo Jackson. He lives by me in Chicago burbs. I met him a couple of nights ago. We were on the sidewalk leaving a Thai restaurant at same time. I was talking to his wife before I knew who they were. i was chatting with the wife about how it was sunny and rainy at same time. I then realized it was Bo and tried to engage him and he was a total douche. It's not like I was bothering him in any way. I was talking to his wife before I even saw him.
In Bulgaria, if it's raining and sunny at the same time, they use an expression that roughly translates to: bears are having a wedding in the forest.
I obviously wasn't there for your encounter with Jackson, and I don't know what he's like irl, but I do know that he's a very private person. Could have just been uncomfortable.