I had a sudden on set of flush and clammy feeling and then both hands and arms got strong pins and needles feeling with uncontrollable stiff cramping in my hands, fingers stiff straight with thumbs curled in. The EMT checked me out and thought it might be dehydration and called my hands a carpoltunnel contractions or something like that. I did not go to the ER and was released but they didn t have any explanation on what or why this happened