Is laughing allowed in yoga class?

The baby has been quiet the past few days, not really moving around as much. Well, he more than made up for it today during prenatal yoga class. We were doing the "legs up the wall" pose. Yeah, it is pretty much just that - laying with your legs up the wall. It is a restful pose that encourages getting extra fluid out of the legs (my puffy feet love/need this). All of a sudden, the babe went into a flurry of movement. He kicked me so hard that I was so surprised, it made me laugh! I did my best to keep quiet, but for some reason it totally cracked me up. And he did it a bunch of times. I eventually had to come out of the pose so that I could get it together. I imagine that soon those kind of kicks won't strike me as funny, but I'll enjoy the novelty of it all for right now.