cap

Hey guys, I'm sure you have all seen the Jason Statham bottle cap challenge, heres the table tennis version! I challenge you all to giving this a go and uploading your video by sending us the link here: <iframe...

I am 14 years old and I have a pain in my knee cap and its only on my right knee and I think its associated with table tennis. I've been playing for two years. Does anyone know what it can be because I've got important tournament next week and need to well. Thanks in advance