Nothing came immediately to mind this week. I thought of heavy rocks in strange formations, like these in Mexico (scanned from an old photo).
I thought of heavy books like this one, 1000 pages, and the content can be quite heavy too!
But then ...... The breeder who sold us our cat used to weigh the kittens daily, and asked us to continue to do so weekly for a little while, just to make sure all was well. We gave that up ages ago, so I was amazed to find him happily curled up in the bowl waiting, or is that weighting :).
But he is now too heavy - the scales recorded an error!
I should, of course, have saved my mirror post for today.