technically no. unless your suffering from some other disease which has an affect on your system when your laughing. but your tombstone would still say 'laughed to death' .
I don't know but i think so... My friend Alexa is REALLY HYPER and laughs out of no where. She is a normal person and does not have ADHD But I have been telling her SHE NEEDS A DOCTER and so does everyone in our class. And she laughs at that too. lol she is C-R-A-Z-Y