During one of Korean pop group GFriend's recent performances in South Korea, they learned this lesson the hard way. Well, at least one unlucky member of the girl band did.
The singer wearing the knee guard (an accessory that might have come in very handy), identified as Yuju by Mashable, ate it not once, not twice, but EIGHT times during one four-minute song.
Being a total pro, Yuju got right back up every single time and pretended like nothing ever even happened. Another fellow band member fell once, too, so there must have been something slippery on either their shoes or the stage and poor Yuju got the worst of it.
There was a full minute that she stayed on her feet, and we were very hopeful that Yuju had conquered the slippery stage, but then this happened...
Unfortunately, it just spiraled downward from there...
We have to give her credit, though, girlfriend is the definition of determination. She never gave up AND she rocked her performance, despite the eight setbacks.