I hate when people abruptly change direction on the MUP and ignore the existence of all the other MUP users. It's annoying and dangerous and no one is laughing when someone is sprawled in the path with tire tracks or shoe prints marked all over. Jogger's fault in this instance because he chose to be oblivious to his surroundings and didn't check over his shoulder before changing direction. Once we become psychic mind-readers maybe we can skitter all over the MUP.