Hmm. That would be during a performance as a dancer here in The Netherlands. I was dancing this Javanese traditional dance called Tari Gambyong. This is how it looks like.
Pic is taken from here
Soon after I started, I felt my kemben (the top) started to fell off. If I let this happen, I would stand there with my corsette underneath. Apparently the wasn’t secured well with pins. Luckily the dance was slow and I had the sash (selendang) to play. With both upper arms tight to the shoulders, I finally finished it.
Besides my fellow dancers, no one in the audience noticed this. Phew!