On the "ninesquare" Minigame, I was playing Pyro, and was conga'ing into the iron bar fence separating the platforms. Note that I was on the Red platform, cong'ing towards the Green platform. When my platform (red) broke, and I was congaing towards the green platform, I seemed to be floating, and still congaing. The cages disappeared, and I was able to safely conga onto the green platform. I had this happen randomly, and I forgot to take a screenshot of the event. While I did test it with the "create server" button on the title screen, I couldn't seem to replicate it. So this may be a bug with the server, or you are required to stand in a specific spot. Hopefully it can be fixed.