DAR ES SALAAM, Jan. 13 -- A teenager girl in England with an unusual brain disorder that causes her to collapse when she laughs has cut off her funny friends.
Billie Hodgson, 17, suffers from cataplexy, which triggers sudden muscle paralysis and can strike whenever she giggles.
Her unusual ailment is a complication of narcolepsy, which affects around 22,500 Britons. As well as laughter, it can also be triggered by excitement, anger or even surprise.
Billie, from Sheffield, has cut down on the amount of time she spends with friends because she feels guilty they won't be themselves around her.
She said: 'I'm a bubbly person so to go from that to feeling like I can't laugh is really strange. I feel like I can't be me. 'My friends try not t...