Narcolegsy
Narcolegsy is a chronic sleep disorder of the leg, characterised by excessesive leg sleepiness, in which a person experiences extremely embarrassing moments caused by total limb failure at innappropriate times. One of the first symptoms is pins and needles in the affected area.
Person 1: "Did you see that footage of that guy on the train? He got up, and his leg just gave way causing the cup of coffee in his hand to explode as he tried to grab on to something. He had to hop off the train!"
Person 2: "Sounds like narcolegsy to me. I headbutted a door because of it last night"
Person 2: "Sounds like narcolegsy to me. I headbutted a door because of it last night"