tsk tsk tsk
A man of no culture i see…
Dance clips are glitches that make obbies easier and help you finish them faster.
For an example, go to a wall, (thats not 1 stud thick. Normally 0.5 stud is perfect) face the wall (make sure your character has no distance from the wall), do /e dance2 and wait till the dance freezes a bit, then immediately shift lock to your side. This causes you to go through the wall. Helped me get to extreme difficulty from effortless easily. If you want a clearer walkthrough, go to https://m.youtube.com/watch?v=8J2gRaYinuo
Anyways, thats the only one left i think. The rest were patched, and it ruined thousands of obbies. So thats why its very benefitial.