I downhill ski. Yes, I realize how fortunate I am to still be able to ski. I also have what I call my, "wonky leg". Basically, I have spasticity and a limp. I have both a cervical and thoracic lesion that cause it to not function at 100%. Since my relapse a year ago I can not bend it more than 90 degrees. It is often stiff, hence the spasticity but I keep on going.
I was skiing in Whistler, British Columbia - The Rockies. The hard stuff at the very summit of Blackcomb Mountain. I took a pretty bad fall (Google, " yard sale skiing" and watch a video and you'll understand what I mean by a bad fall

Here's where stress and MS come together.....
I started down the hill again only to discover that I could NOT engage that wonky leg to make a right turn. My brain could not get the signal to my leg. I had never experienced complete lack of ability getting a limb moving. It scared the crap out of me! So I stood there and just calmed myself and focused on breathing. After about ten minutes my brain-to-leg connection started working again and I was fine the rest of the trip. I shared because I thought it was an interesting example of how an intense, sudden stressor can adversely affect our MS status.