A gentle rather than brutal ass kicking.
Dylan Thomas was an English poet in the 50s.
Like all poets that means he was all about the pent up, whininess that permeated the overwhelming majority of poetry from that era. (Test reader is a poet, after reading that line I was told to go fuck myself. I think I am onto something here.)
However, in the realm of pent up emo angst, Thomas was a god and should have sacrifices made in his name. (There has to be perks for being the top of your field, even if its whiny.)