Walked on the glass floor in Macao's Radio Tower - signs were posted "watch out for falling people" as there was also bungey jumping off the top! Also did the glass floor in Shanghai. https://www.google.com/search?q=glass+floor+in+shanghai&tbm=isch&tbo=u&source=univ&sa=X&ved=2ahUKEwiMp7ebourcAhUthOAKHe18By0QsAR6BAgBEAE&biw=1586&bih=923#imgrc=zRaXd__iconWCM: