Popping knee?

[PaperFacesOnParade]

I don't really know how to explain this, but the bottom half of my leg pops out of my knee when i sit in a certain position, and it's both of my legs. The first time it happened I was sat on my knees. It sounded like a pop and it felt like something had locked. It was extremely painful. Only when I pulled my leg out straight did it pop back.
that was a really poor explanation... but it's the worst pain I have ever felt!
I am going to the doctors in about 2 weeks, but does anyone know what this maye be?

I do dance, but this started before I started ballroom

[Modus Operandi]

Hmm, I'm not really sure. The tendons connecting your patella(the knee bone)to the rest of your leg may be a little hypermobile and thus it may come out of alignment easily.

Again, take that with a massive grain of salt, I'm just putting it out there. Feel free to disprove.

[2D]

Mine do that. Only they don't hurt anymore. Seeing as I'm a guy I naturally said, "LOOK AT THIS" and popped them out repeatedly a whole bunch and now it doesn't hurt. It's completely normal though. Just try not to pop them out I think.

[PaperFacesOnParade]

Hmm, I'm not really sure. The tendons connecting your patella(the knee bone)to the rest of your leg may be a little hypermobile and thus it may come out of alignment easily.

Again, take that with a massive grain of salt, I'm just putting it out there. Feel free to disprove.

Thanks! That's actually really interesting... I never knew that!

[PaperFacesOnParade]

Mine do that. Only they don't hurt anymore. Seeing as I'm a guy I naturally said, "LOOK AT THIS" and popped them out repeatedly a whole bunch and now it doesn't hurt. It's completely normal though. Just try not to pop them out I think.

Woah XD I wouldn't dream of doing it on purpose, it's really painful ;____;