I understand where you're coming from. While I don't necessarily laugh, I sometimes watch in befuddled amazement.
A few years ago, when my daughter and I were just starting to realize the extent of AW's problem, AW put a pouch of Kraft cheese sauce in the Microwave, thinking it was popcorn.
Of course, it burned to a crisp and stunk up the house.
When Daughter asked AW what she was making, AW said "Bubble Corn".
It's tragic and sad, but you're right... sometimes I have to laugh to keep from crying.