My knee is Stuck

Patient: Hi i was in a knelling postion the other day and i got up and had this horrible felling in my knee, i thought it was a charlie horse, but it didn’t fell like it was a muscle. It felt as it my knee was stuck! when i got up i twisted my knee and it popped and the tension was gone! Today the same thing happened after kneeling but my knee still felts a little tension.