Shortbus captain?

Do you ever get so tired you just burst into laughter, like crazy manical laughter where you cant stop and maybe even snort? Yeah I totally did today at work.... nice. I was super tired and I was getting punchy and I was telling a mildly funny story and couldnt even finish because I couldnt catch my breath and had tears coming out of my eyes. I guess half the unit heard me...nice. I guess crazy laughter at work though is better than crying right?