Is it normal that i get laugh attacks randomly and where i should not?

I did that at a funeral when i was 11...Talk about bad timing...Lady started singin opera and i couldn't contain the laughter. I was in tears. I tried to pull it off like i was crying...No didn't work. I got in trouble and they made me leave the room lol....Ya i don't know how this helps you but it does happen. Can't do nothin about it besides brush your shoulders off and keep walkin.