My legs just suddenly stop working. There is no warning sign. I find out by standing up from a chair and my legs are jello. I have complete control of my legs, I can walk,climb stairs,get out of a chair, any thing, then out of the blue I have lost control of my legs. There is no pain or any kind of sensation. No matter how hard I try they will not respond. Then several hours later my legs start working, back to normal. No side effects it's like it never happened. I have seen Doctors and specialist. I have had MRI,Cat scan, X ray, brain wave test They can't find any thing. I see a chiropractor for lower back pain. I'm 71 years and I have diabetes,CHF and COPD. All are in control as best as they can be. I see Doctors and follow their advise.