William Sommerwerck wrote:

The transformer will probably hum loudly and get hot, and perhaps
burst into flames after a while. Eventually, a fuse, if fitted, will blow,
and when the insulation burns off the wires, a short will blow the
mains fuse. This is the result of saturation.

But (as Red Green points out) that would at least as entertaining as your
average "Matlock" episode. Probably more so.

One doesn't leap with joy when one's house burns down,
or when you realise one hasn't renewed the fire insurance policy.....

Patrick Turner.