Sometimes everything is too funny and I need to go outside and ride my bike on an isolated trail and laugh hard so I don't disturb my coworkers. Then I return energized and satisfied. Eventually perhaps, regular outbursts of laughter can be a normal aspect of being near other people. Maybe it's just my own self-consciousness that prevents it.
Funny thing is, as I was typing this holding in a laugh, somebody on the other side of the wall burst out laughing. Now I'll run downstairs and hop on my bike.