( January 5, 2024, 1:20 PM EST) -- FORT MYERS, Fla. — An expert retained by a man who alleges that he slipped and fell in a Walmart store parking lot based his opinions on a reliable methodology and his conclusions will be helpful to a jury, a Florida federal judge ruled, but also found that the rebuttal witness hired by the retailer failed to meet those requirements and granted a motion to exclude his testimony....