Today i smacked my knee really hard on the bottom of the table. When your sitting down you can feel two big bumps oh each side of your knee, i smacked it good right in the middle. Anyway i was overwhelmed by an intense pain and my body went warm. from what my mom said my eyes started rolling into the back of my head and my body started to slowly fall over. fortunately i regained myself and didn't hit the floor. it felt like i was being put under. could i have hit a nerve? is this normal?