As he struggled to get free, I ran up and sucker punched him in the gut.
In a place where every spider and squid can take you down faster than a sucker punched boxer you cherish niceness in the animal kingdom.
In football a sucker punch means a goal that is scored when the other team wasn't prepared: they give an easy goal away.
Arsenal made a quick break from a Liverpool corner and scored a sucker punch goal - there were few Liverpool defenders to stop Arsenal.