I used to get this at the most inconvenient moments. I remember having it in a funeral, and also right in the middle of a math class. with the funeral, it was just embarrasssing, they were laying the gal to rest and I was sat in the back row laughing for no reason at all. in math, it was because the teacher mentioned number 11, their's nothing funny about the number 11- but school called me 11 for some time after that as it just cracked me up for some reason.

now I get it when ever a serious comercial comes on tv. I see the cat's protection one, fall about laughing at the question of I wonder if they take dogs and stay like that for ages. I saw one about poor kids in africa and burst out laughing too. both comercials are very serious indeed, but I can't help it. something In my brain triggers and I just laugh about it.