Ok, so I start to shake and twitch whenever I exert myself physically - or even emotionally (like if I get scared by something - or nervous) goes on forever (not really, but feels like it).

Not your average tremble, but full on shaking so hard my whole body moves and I can't stop it.

Interestingly, it is always my left leg that goes off, shakes, or collapses - and when I had my MRI last week my neuro was commenting about a spinal lesion I have developed and told me that a lesion in that specific place would affect my left leg.

So there you go...... exactly what I thought, but nice to have validation