I have one hybrid rugosa, Hansa. It is
terribly, terribly ugly for most of the year,
just brown sticks. While pruning my lovely sprouting
floribundas, hts, shrubs, etc., I could not stand
its long spidery death-brown "canes" for another
instant and I hard pruned it into a nice little
shrubby shape. There is NO sign of any growth
on the thing, typical of it at this time of year.

How much damage did I do?