It has happened several times in my local group that a member is overcome by uncontrollable laughter. They then try their best to collect themselves and share all that comes up correctly, however, they really struggle to stop laughing. Am I supposed to interfere as a leader?

Basically interfering is neccessary only if the overall group process of honest sharing is at risk. If someone has to laugh loudly once, this is not a problem, or if someone once has to cry. On the other side if this becomes more or less a habbit and is used to bypass the honest sharing (emotions) then I would tell the group or the individual to try to not go into laughter, tears or whatsoever. Laughter and even tears *can* be used to suppress feelings. But it can also be part of a deep release and transformation. It is difficult to give general answers. Over the months and years of group leading you will directly feel and know what has to be done.