In the 1500, Julia Heymach was cut off multiple times on the last lap. Coming into the final 100, you can see the Arkansas runner look behind her, see Heymach, and then drift from lane 1 to lane 3. Due to that, Heymach loses all momentum. Might be an unpopular opinion, but I think it is terrible sportsmanship to block runners from passing you. Throw elbows, hold your own space since you are entitled to it. But don't start jumping in front of people with the sole purpose to block them.