This is exactly what happened to me on this very level for my 120th star in 1997. I convinced my parents to throw a party after church on a Sunday evening. A bunch of my friends and their parents were over that night, I saved the last star to achieve the 120 in front of everyone.... well I fell right after I hit 100 coins and the star appeared. As a 10 year old child, this was devastating! I remember running to my room in shame. My mom came in a few minutes later and told me to not give up and that everyone is rooting for you (which they were just all adults enjoying time together, most didn't really care, but my friends did lol). I went down there and on the next attempt I got the 100 coins, the star and completed Mario 64 with 120 stars and everyone was excited to meet Yoshi at the top of the castle. This memory will never leave my mind. The good 'ol days.