How can I stop a sim from die-ing from laughter?

oh good idea. I actually was able to get her to go and meditate but it took about three restarts before I was able to break into the hysterical mood. Then after she meditated and got calmed down she took a bath and was hysterical again so had to stop that and send her to bed. My sims just get too much happiness I guess. Have to think of some stuff to make them less happy?