I have been suffering from these intense short lasting
second) electric shock-like episodes in my knee
for about 4 years
. I have the same symptoms and it presents in the same way. It is localized in the right knee, kind of to the outside. It goes as quickly as it comes. It can happen at any time and any position ... sitting, lying down, driving, standing, completely random. The first time it happened when I was sleeping. Then it didn't happen for about a year.