Funny story -- My dad and I were on our way home one day and I just started laughing. I couldn't stop! It got to the point where he told me if I didn't stop he'd ground me! This lasted a good 20 minutes before I had to stop because I couldn't breathe..... (There was no thought that I can remember. I'm pretty sure I was just staring out the passenger window waiting to get home)

Anything like that?