I didn't get this point
Obvious SPOILER
Why wouldn't the diamonds have gotten stuck in the plumbing?
I can see one or two, or even a handful of small diamonds passing through the pipes. But whole drawersful?
And especially, how did the humongo diamond end up in the toilet?
I took it that it had somehow made its way backwards up the pipes, clogging the bowl. Anti-gravity?
Or did someone drop it in the bowl? Who?