Its one of my favorite things when Grams has a laughing fit.

She finds something funny, usually a miniscule mishap, and just can't contain her laughter.
My dad is the same way.
It always happens at the most inappropriate times:
in the middle of church, (the most embarrassing with grams) in the middle of a funeral (the most embarrassing and terrible with dad), when the waiter misspeaks (the funniest of all).
I just really love them both a lot.