qep'a' 30 - During the event, a leak caused water to come from the ceiling. While describing this to Dr. Okrand, I (qurgh) said "The ceiling rained" and he replied by saying that expression would be how SIS should be used. We established that the subject of SIS, and other weather verbs, is the source of that activity. In the case of SIS this could be muD, 'eng, or pa' beb.

Email From DloraH in 1998, confirmed at yotna' 2002 - SIS.  In a way everyone was correct with this one.  It rained a few times during the weekend, so we (DloraH and Okrand) were put into the situation to discuss it.

All correct. (Said Okrand)

SISlu', although grammatically correct, he (Okrand) didn't particularly like.  Someone COULD use it but to me it sounds like they skipped science class and don't know what the subject is.

(Okrand also said) You can also give it an object and say things like the clouds rained down cats and dogs ... or something like that; you get the idea.

But when Marc and I (DloraH) went outside and drops of water were falling on us, he looked up and simply said "SIS".