question: I was on my normal 5 mile walk yesterday and all of a sudden going up a hill I got this sudden sharp pain that ran thought my knee cap. Almost like an electrical shock. Only lasted a few seconds but started walking and it happened again. Got home did the whole ice, elevate and did some stretching. Doesn t bother me to kneel or go up stairs. Today I ve has a few (3) episodes. It s totally random. I do have osteo arthritis. Any thoughts?