I think it depends on the congregation how much humor and laughter is apparent and acceptable. When I first visited a KH, I was appalled by what I had always felt was disrespectful in a church. There was whispering, note passing, openly sharing candy, snickering sotto voce comments. I was raised Catholic, and woe to me and my siblings if we didn’t kneel up straight god forbid we talked. And candy?
in the second congregation I attended, there was too much infighting for anyone to be laughing at much of anything.